It's not secret that we are passionate about watches that tell a story, blending craftsmanship, history, and bold design. Few timepieces embody this ethos, particularly the boldness, as extravagantly as the Rolex GMT-Master II "Ice" reference 116769TBR. Introduced in 2007, this white gold, diamond-encrusted marvel holds the distinction of being the most expensive Rolex ever retailed, with a jaw-dropping MSRP of $485,350. Known simply as the "Ice," this watch is a dazzling testament to Rolex’s mastery of gem-setting and its ability to push boundaries while staying true to the GMT-Master’s functional heritage. Let’s dive into what makes this rare timepiece a collector’s dream and a horological spectacle.

A Glittering Legacy

The Rolex GMT-Master, launched in 1954 in collaboration with Pan American World Airways, was designed for pilots needing to track multiple time zones. Its signature 24-hour bezel and dual-time functionality made it a tool watch for globetrotters. Over decades, the GMT-Master II evolved, introducing iconic bezels like the “Pepsi” and “Batman.” But in 2007, Rolex took a bold leap with the 116769TBR, transforming the utilitarian GMT-Master II into a haute joaillerie masterpiece. Nicknamed the “Ice” for its blinding array of diamonds, this watch never appeared in Rolex’s official catalog, adding to its mystique and exclusivity.

Produced in limited numbers and discontinued shortly after, the 116769TBR is a unicorn in the Rolex lineup. Its debut marked a pivotal moment, showcasing Rolex’s prowess in gem-setting—a field where the brand is less known but equally formidable. As Phillips noted, the “Ice” solidified Rolex as a leader in secure, durable gem-setting, ensuring that every diamond stays in place, even with daily wear.

Design: A Dazzling Spectacle

The GMT-Master II "Ice" is not for the faint of heart. Crafted entirely in 18k white gold, its 40mm case is a canvas for nearly 30 carats of diamonds, covering nearly every visible surface. Here’s a closer look at its design:

• Diamond-Studded Everything: The case and lugs are adorned with 79 round diamonds, while the bi-directional rotating bezel sparkles with baguette-cut diamonds and a single triangular-cut diamond at 12 o’clock. The pave diamond dial creates a mesmerizing ripple effect, and the bracelet—also in 18k white gold—is encrusted with more diamonds, making it a showstopper from every angle.

• Functional Elegance: Despite its opulence, the 116769TBR retains the GMT-Master II’s core functionality. The 24-hour bezel tracks a second time zone, and the date window at 3 o’clock, magnified by a cyclops lens, ensures practicality. The black GMT hand contrasts sharply against the diamond dial for legibility.

• Robust Build: Weighing over half a pound, the “Ice” is a substantial piece, reflecting Rolex’s commitment to durability. The sapphire crystal, with a semi-invisible crown etched at 6 o’clock, protects the dazzling dial while maintaining scratch resistance.

This watch is unapologetically bold, a departure from Rolex’s typically understated designs. As one source aptly put it, the “Ice” proves Rolex can “master the bling-bling” while retaining its reputation for reliability.

The Heart: Calibre 3186

Beneath the glittering exterior lies Rolex’s Calibre 3186, a self-winding movement known for its precision and robustness. This COSC-certified chronometer operates at 28,800 vph and offers a 48-hour power reserve. The movement features a Parachrom hairspring for enhanced resistance to shocks and temperature variations, ensuring the watch performs as well as it looks. While the diamond-encrusted case back obscures the movement, Rolex’s meticulous finishing—polished bridges, blued screws, and a gold oscillating weight—underscores the brand’s attention to detail. The “Ice” may dazzle on the outside, but its heart is pure Rolex engineering.

A Collector’s Perspective

The 116769TBR is not just a watch; it’s a statement. Its rarity and exclusivity have made it a favorite among high-profile collectors, with celebrities like Cristiano Ronaldo, Brad Pitt, and David Beckham reportedly owning examples. Ronaldo was spotted wearing his at the 2019 Dubai International Sports Conference, pairing it with jewelry worth over $800,000, cementing its status as a symbol of extravagance.

For collectors, the “Ice” is a paradox: a functional GMT-Master II wrapped in unparalleled luxury. Its limited production run—believed to be just a handful of pieces—makes it a grail for those who seek rarity. On the secondary market, The Keystone has offered examples in excellent to like-new condition, complete with box, manuals, and warranty card, dating from 2008 to 2014.

However, the “Ice” isn’t without detractors. Some purists argue that its ostentatious design strays too far from the GMT-Master’s tool-watch roots. Others question whether its retail price—nearly double that of the next most expensive serial-produced Rolex, the Platinum Pearlmaster—justifies its value, especially compared to auction records like Paul Newman’s Daytona, which fetched $17.8 million. Yet, for those who embrace its audacity, the 116769TBR is a trophy that commands attention.

Why the GMT-Master II "Ice" Endures

The Rolex GMT-Master II "Ice" 116769TBR is a polarizing masterpiece—a tool watch transformed into a jewel-encrusted icon. Its blend of Rolex’s legendary reliability, innovative gem-setting, and unapologetic extravagance sets it apart in the world of luxury timepieces. Whether you see it as a bold statement or an over-the-top indulgence, there’s no denying its place in horological history.

For those captivated by its sparkle, The Keystone offers authenticated pre-owned examples, meticulously inspected by our watchmakers to ensure top condition.

 Interested in adding the “Ice” to your collection? Contact us at hello@thekeystone.com or text/call (213) 632-9061 to inquire about availability or explore our current inventory. Have a story about a gem-encrusted Rolex or thoughts on the 116769TBR? Share them with us—we’d love to hear from you.

In the pantheon of luxury watchmaking, Patek Philippe reigns supreme, crafting timepieces that are as much works of art as they are instruments of time. Among its illustrious creations, the Reference 591 stands as a rare and captivating chronograph, a testament to the brand’s mastery during a pivotal era. Produced between 1938 and 1947, this watch encapsulates the elegance and innovation of mid-20th-century horology, earning a revered place in the hearts of collectors. With its distinctive design, limited production, and historical significance, the 591 is not just a watch—it’s a piece of history.

Historical Context: A World in Transition

The late 1930s and 1940s were a tumultuous period, marked by global conflict and economic challenges. Yet, in Geneva, Patek Philippe continued to push the boundaries of watchmaking. The demand for chronograph wristwatches was rising, driven by their practical applications in science, sports, and medicine. Patek Philippe responded with models like the Reference 130, their first serially produced chronograph, launched in 1934. The Reference 591 followed, introduced in 1938, offering a fresh design perspective while leveraging the same reliable movement. This era saw Patek Philippe balancing tradition with innovation, creating timepieces that were both functional and aesthetically refined.

Design and Features: The "Fagiolino" Aesthetic

The Reference 591 is instantly recognizable for its unique design, particularly its "bean-shaped" lugs, which have earned it the affectionate nickname "Fagiolino," meaning "small bean" in Italian. These lugs, paired with similarly shaped chronograph pushers, create a harmonious and elegant silhouette that distinguishes the 591 from its contemporaries. The case, measuring 34 mm in diameter, was typical for the period and crafted in either 18K yellow gold or pink gold, materials that exuded luxury and sophistication.

The watch’s dial variations add to its allure. Most examples feature silvered dials with tachymeter scales, ideal for measuring speed over a fixed distance—a nod to the chronograph’s practical roots. However, rare variants elevate the 591 to legendary status. One such example is a 1939 pink gold model with a matching pink dial and a pulsation scale, designed for medical professionals to measure heart rates. This particular watch, signed by Walser Wald, a prominent retailer in Buenos Aires, is one of only two known with this configuration, making it a holy grail for collectors.

At the core of the 591 lies the caliber 13-130, a manual-winding chronograph movement based on the Valjoux 23 ébauche. Patek Philippe transformed this base movement through extensive modifications and meticulous finishing, incorporating 23 jewels, a straight-line lever escapement, and a self-compensating Breguet balance spring. Stamped with the Geneva Seal, the movement is a masterpiece of classical design, celebrated for its reliability and aesthetic beauty.

Technical Specifications

Production and Rarity: A Limited Legacy

The Reference 591 is among the rarest chronographs produced by Patek Philippe during the 1930s and 1940s. Estimates suggest that only approximately 100 pieces were crafted over its nine-year production run. Of these, around 40 are believed to be in yellow gold and 60 in pink gold, though some sources cite slightly different figures, such as 54 in pink gold. The discrepancy reflects the challenges of documenting vintage production, but all agree on the 591’s scarcity. Research indicates that fewer than 17 yellow gold examples and about 27 pink gold examples have surfaced in the market, underscoring their elusive nature.

This limited production enhances the 591’s appeal among collectors. Unlike the more widely recognized Reference 130, which shares the same caliber 13-130 movement but features a traditional round case with straight lugs, the 591’s unique design sets it apart. Its rarity and distinctive aesthetic make each appearance at auction a significant event, drawing attention from enthusiasts worldwide.

Notable Examples and Auction Results

The Reference 591’s value is reflected in its auction performance, where pristine examples command substantial sums. A standout is the 1939 pink gold 591 with a pink dial and 30-pulsation scale, signed by Walser Wald. This watch, one of only two known with this dial configuration, sold at Phillips Auctions in November 2017 for CHF 100,000 and again in December 2021 for $201,600. It is currently listed by TropicalWatch.com for $246,850, highlighting its enduring demand.

Another notable example is a 1940 yellow gold 591 with a silvered dial and tachymeter scale, sold with a Patek Philippe Extract from the Archives confirming its sale on November 4, 1940. A similar yellow gold model fetched CHF 149,250 at auction in 2004, demonstrating the 591’s consistent value over time. These results underscore the watch’s status as a collector’s treasure, with its rarity and condition driving prices ever higher.

Comparison to Contemporaries

The Reference 591 shares its movement with the Reference 130, Patek Philippe’s first serially produced chronograph, launched in 1934. While the 130 is celebrated for its classic design and broader production (approximately 1,500 pieces), the 591’s "Fagiolino" lugs and limited numbers give it a distinct identity. The 130’s straightforward case design contrasts with the 591’s more artistic approach, making the latter a bolder statement of style. Both watches represent Patek Philippe’s early mastery of chronograph complications, but the 591’s rarity and unique aesthetics elevate it to a niche coveted by discerning collectors.

Collectibility and Modern Relevance

Today, the Reference 591 is a cornerstone of vintage Patek Philippe collections, prized for its scarcity and historical significance. Its value has soared in recent decades, driven by growing interest in vintage chronographs and Patek Philippe’s enduring prestige. The watch’s compact size, once standard, now appeals to collectors seeking understated elegance in contrast to modern oversized timepieces. 

The 591’s rarity ensures it remains a rare sight, even at major auctions. Collectors must act swiftly when one appears, as opportunities to acquire a well-preserved example are fleeting. Its blend of technical prowess and aesthetic innovation makes it a timeless piece, embodying Patek Philippe’s philosophy of creating watches that transcend generations.

The Patek Philippe Reference 591 is more than a timepiece; it is a horological artifact that captures the essence of a bygone era. Its "Fagiolino" lugs, masterful caliber 13-130 movement, and limited production make it a standout in Patek Philippe’s storied history. For collectors, owning a 591 is akin to possessing a piece of art—a rare privilege that connects them to the craftsmanship and elegance of mid-20th-century watchmaking. As auction results and market demand demonstrate, the 591’s allure only grows with time, cementing its status as a true icon of horology.

A Symphony of Innovation

At The Keystone, we’re captivated by timepieces that transcend mere function to become works of art, history, and engineering. Few watches embody this ethos as profoundly as the Patek Philippe Reference 5013, a Grand Complication that holds a singular place in horological lore as the maison’s first automatic minute repeater. Introduced in 1992 and crafted until around 2011, the 5013 is a testament to Patek Philippe’s relentless pursuit of excellence, blending a poetic retrograde perpetual calendar with the celestial chime of a minute repeater. Let’s step into the world of this tonneau-shaped masterpiece and explore why it remains a collector’s dream.

A Historic First

The Reference 5013 broke new ground when it debuted, not just for its breathtaking aesthetics but for its technical audacity. Patek Philippe, renowned for its mastery of the minute repeater—a complication that chimes the time on demand with crystalline precision—had traditionally paired this feature with manual-wind movements. The 5013 changed that narrative. Powered by the Caliber R 27 PS QR, it became the first Patek minute repeater to feature automatic winding, a feat achieved with a 22k gold micro-rotor. This innovation allowed the watch to harness the wearer’s motion while preserving the slim elegance required for such a complex mechanism, comprising 515 individual parts.

But Patek didn’t stop there. The 5013 marries its repeater with a perpetual calendar, complete with a retrograde date hand, day, month, leap year indicators, and a moonphase. This combination was unprecedented, making the 5013 not just a watch but a horological milestone. With only about 101 examples produced across platinum, yellow gold, rose gold, and rare bespoke variants, its exclusivity is undeniable.

The Art of the Tonneau

The 5013’s tonneau-shaped case is a nod to Patek’s Art Deco-inspired designs, offering a refined alternative to the round cases of its peers. Measuring approximately 36–37 mm in width and 46–46.5 mm lug-to-lug, with a thickness of 12–12.8 mm, it strikes a balance between presence and wearability. The stepped bezel and polished curves catch the light with understated elegance, making it a versatile companion for black-tie affairs or quiet moments of reflection.

Available primarily in platinum (5013P, ~45 pieces), yellow gold (5013J), and the exceedingly rare rose gold (5013R), the case material influences not only aesthetics but also the minute repeater’s sound. Rose gold, as Patek Philippe has noted, produces an optimal resonance, giving the 5013R a chime that collectors describe as “sublime.” Some platinum models include a solid case back for enhanced acoustics, with an optional sapphire back to reveal the movement’s intricate beauty. Unique variants, like the 5013R-014 with diamond-set indexes, elevate the watch to one-of-a-kind status, as seen in international auctions.

A Dial of Poetic Precision

The 5013’s dial is a study in balance and clarity, despite its wealth of information. Available in silver (common for yellow gold and platinum), black (favored in rose gold), or white (rare in platinum), the dial exudes sophistication. Applied Breguet numerals or diamond-set indexes in bespoke models lend a touch of opulence, while the layout is both functional and poetic:

• Apertures at 9 o’clock (day), 3 o’clock (month), and 12 o’clock (leap year) provide perpetual calendar data.

• A retrograde date hand sweeps gracefully from 8 o’clock to 4 o’clock, resetting at month’s end.

• A moonphase and small seconds subdial at 6 o’clock adds celestial charm.

The retrograde date, a hallmark of the 5013, is more than a complication—it’s a visual dance, drawing the eye as it arcs across the dial. As a collector once shared with us, “The 5013’s dial feels alive, like a story unfolding with every glance.”

The Heart: Caliber R 27 PS QR

At the core of the 5013 lies the Caliber R 27 PS QR, a movement that showcases Patek’s engineering prowess. With 39 jewels, a 38–48-hour power reserve, and a free-sprung balance adjusted for five positions, it’s a marvel of precision. The minute repeater, activated by a slide on the case, produces a chime that’s been lauded as one of Patek’s finest, particularly in rose gold models. Each repeater is tuned by hand, ensuring a unique auditory signature—clear, resonant, and hauntingly beautiful.

The perpetual calendar, meanwhile, adjusts effortlessly for leap years and varying month lengths, a testament to the movement’s complexity. Stamped with the Geneva Seal (later the Patek Philippe Seal), the caliber reflects the maison’s uncompromising standards. 

A Legacy in Time

The Patek Philippe Reference 5013 is more than a watch—it’s a symphony of innovation, artistry, and heritage. As the first automatic minute repeater in Patek’s storied history, it redefined what a Grand Complication could be, blending cutting-edge mechanics with timeless elegance. Whether you’re drawn to its resonant chime, its poetic retrograde date, or its place in horological history, the 5013 is a reminder of why Patek Philippe remains the pinnacle of watchmaking.

At The Keystone, we’re honored to share the stories of timepieces like the 5013. If you’re seeking one for your collection or simply wish to learn more, reach out—we’d love to guide you on this journey through time.

The website for The Keystone, a high-end vintage watch dealer in Los Angeles, features a section dedicated to “holy grails,” or collectible watches distinguished by their quality and rarity. Exhibit A: the Patek Philippe Ref. 591 chronograph that appears at the top of the page. Housed in a 34 mm rose gold case, the c. 1939 wristwatch was sold by Walser Wald, a renowned Patek Phillipe retailer in Buenos Aires, and features a genuine rarity: the dealer’s signature on its salmon-pink dial.

Among the 16 additional grails listed on the site, the usual steel suspects (the Royal Oak, the Nautilus and, of course, the Daytona) are missing in action. Instead, they’ve been upstaged by a slew of surprising, even festive pieces—including four models set with a kaleidoscope of colored stones, such as a yellow gold Rolex GMT-Master “SARU” ref. 16758 featuring blue SApphires and red RUbies on the bezel. 

The Keystone’s selection of vibrant, gem-set wristwatches—be they models set with faceted stones, usually sapphires, or those bearing dials made of colorful hard stone—isn’t exactly new. “We have always been drawn to watches with gemstones,” co-founder Max Abbott tells Robb Report, acknowledging that for a long time, “we were outliers in that regard.”

What’s new is that buyers are now getting the memo. Dealers at the Original Miami Beach Antique Show earlier this year noted the rising popularity of stone dial watches from brands like Rolex and Piaget. At The Keystone, the trend is playing out much the same way. “We’d put up these fossil dials and really funky stuff that eight years ago didn’t get the love that they should have been getting,” Abbott says. “And now buyers are really starting to get it.”

The faceted pieces, however, tend to draw more knowledgeable collectors. “The brands we tend to focus on—like Patek Philippe, Rolex, Cartier and Audemars Piguet—all have very high standards for quality and setting in their jeweled watches,” Abbott says. “This gives collectors the confidence that the brands bring the same intense focus for quality of stones as they do for their watchmaking. Another great thing about gem-set watches is that they do not take themselves too seriously.”

The less sober, more fun approach to watch collecting extends beyond buyers’ newfound interest in vintage Rolexes steeped in the brand’s more bohemian vibe—like these groovy styles that Italian Watch Spotter highlighted a few years ago—to modern chronographs bedecked with multicolor sapphires. Take the $112,100 Chronomaster Sport Rainbow that Zenith introduced at LVMH Watch Week. Set with 5.36 carats of baguette-cut diamonds and sapphires, the 41 mm piece is encased in white gold and features rainbow hour markers on a black lacquer dial.

“It’s very much a gem-set sparkling product,” Romain Marietta, Zenith’s chief product officer, explained as he presented the brand’s novelties. He noted that the Chronomaster Sport Rainbow marks the first time that Zenith has made a watch in full white gold, with a white gold bracelet, and the first time that the rainbow bezel appears in the Chronomaster collection. “It has a black dial to create contrast and to make the stones really pop,” he added.

Yoni Ben-Yehuda, head of watches for the retailer Material Good, saw the color trend coming when he spoke to Robb Report in December about his boldest predictions for the new year: “I think 2025 will be the year of exotic dials,” he said. “I think we will see a huge renaissance of stone dials from both the independent brands, along with some of the more forward-thinking larger houses. A play in materials, from colors to textures, will add depth and life to dials and highlight complications.”

The color phenomenon reflects a truism about the modern watch market in the post-post-pandemic era: “It’s people wanting something different rather than getting the coin that everybody wants,” Abbott says. “Everybody wanted a 5711. You got it, cool—you got the token. But now people, I think, want to express themselves and differentiate themselves.” 

Color us thrilled!

Exploring the Patek Philippe 5374: A Masterpiece of Horological Artistry

When it comes to luxury watchmaking, few names resonate as powerfully as Patek Philippe. For nearly two centuries, this Swiss manufacture has set the standard for craftsmanship, innovation, and timeless elegance. Among its impressive lineup of Grand Complications, the Patek Philippe 5374 stands out as a breathtaking fusion of technical prowess and aesthetic refinement. Whether you're a seasoned collector or simply an admirer of fine timepieces, the 5374 is a watch that demands attention. Let’s dive into what makes this reference so special.

A Legacy of Complications

The Patek Philippe 5374 is part of the brand’s prestigious Grand Complications collection, a category reserved for watches that showcase the pinnacle of horological engineering. Introduced as a spiritual successor to the revered Reference 3974—a watch created in 1989 to celebrate Patek Philippe’s 150th anniversary—the 5374 carries forward a legacy of combining two of the most coveted complications in watchmaking: the minute repeater and the perpetual calendar.

The minute repeater, a mechanism that chimes the time on demand, is a testament to Patek Philippe’s mastery of sound and precision. In the 5374, this feature is elevated with the use of “cathedral” gongs, which are longer than standard gongs and wrap almost twice around the movement. The result? A richer, deeper, and more resonant chime that lingers in the air—a signature touch that delights the ears as much as the design pleases the eyes. Paired with this is the perpetual calendar, a complication that tracks the day, date, month, leap year, and moon phases with no need for adjustment until the year 2100. Together, these features make the 5374 a marvel of both utility and artistry.

Design That Commands Attention

While its technical achievements are impressive, the 5374’s design is equally captivating. Available in multiple variants, such as the platinum 5374P and the white gold 5374G, this watch balances tradition with modernity. The case measures 42mm in diameter—a noticeable increase from the 36mm of its predecessor, the 3974—offering a more contemporary presence on the wrist without sacrificing elegance. The case design features a subtle interplay of curves, with a concave bezel that adds depth and character.

The dial is where the 5374 truly shines. Depending on the version, you might encounter a glossy Grand Feu enamel dial (as seen in the 5374G) or a lacquered finish with a black-gradient rim (as in the 5374/300P Haute Joaillerie model). The enamel option, crafted through a painstaking process of layering and firing powdered glass on an 18K gold base, showcases Patek Philippe’s commitment to traditional techniques. Gold-applied Breguet numerals or gem-set hour markers provide a striking contrast, ensuring legibility while adding a touch of sophistication. For the Haute Joaillerie variant, the dial is framed by an “amphitheater” of baguette-cut diamonds and sapphires, creating a dazzling effect that elevates the watch into the realm of high jewelry.

The Heart of the Matter: Caliber R 27 Q

Powering the 5374 is the self-winding Caliber R 27 Q, a movement that exemplifies Patek Philippe’s engineering excellence. With 467 components, 39 jewels, and a 22K gold mini-rotor, this caliber delivers a power reserve of 38 to 48 hours. The movement is meticulously finished, featuring hand-polished bridges and a Gyromax® balance wheel oscillating at 21,600 vibrations per hour. Visible through the interchangeable sapphire crystal case back (a solid back is also provided), the Caliber R 27 Q is a feast for the eyes, adorned with the Patek Philippe Seal—a mark of uncompromising quality.

What’s particularly noteworthy is the attention to the minute repeater’s sound. Before leaving the manufacture, each 5374’s chime is personally evaluated by Thierry Stern, the president of Patek Philippe, ensuring that every watch meets the brand’s exacting standards. This hands-on approach underscores the family-owned company’s dedication to perfection.

Variants That Inspire

The 5374 comes in several iterations, each with its own personality. The 5374P-001 (shown throughout this article), in platinum, features a sleek black enamel dial with gold Breguet numerals, paired with a shiny black alligator strap. The 5374G-001, crafted in white gold, offers a Grand Feu blue enamel dial that exudes understated elegance, complemented by a dusk-blue alligator strap. For those who crave extravagance, the 5374/300P-001 takes things to another level with its platinum case encrusted with 228 baguette-cut diamonds (11.62 carats) and 13 blue sapphires (0.72 carats), alongside a blue-lacquered dial. Each variant showcases Patek Philippe’s ability to cater to diverse tastes while maintaining a cohesive identity.

Final Thoughts

The Patek Philippe 5374 is more than just a timepiece; it’s a celebration of what’s possible when tradition meets innovation. From its resonant cathedral gongs to its perpetual calendar’s flawless precision, every detail reflects the brand’s unwavering pursuit of excellence. Whether you’re drawn to its technical brilliance, its stunning design, or its status as a collector’s icon, the 5374 is a reminder of why Patek Philippe remains the gold standard in luxury watchmaking. For those fortunate enough to experience it, this watch is nothing short of a masterpiece.

On the hunt for this watch? 

Please reach out by emailing hello@thekeystone.com or calling 213-632-9061

A Timeless Masterpiece: Exploring the Breguet Perpetual Calendar 3050BA

When it comes to luxury watchmaking, few brands carry the weight of history and innovation quite like Breguet. Founded in 1775 by Abraham-Louis Breguet, the brand has long been a pioneer in horology, introducing groundbreaking inventions like the tourbillon, the Breguet overcoil, and the first self-winding watch. Among its many celebrated creations, the Breguet Perpetual Calendar 3050BA stands out as a neo-vintage gem that encapsulates the elegance, precision, and sophistication the brand is renowned for. In this article, we’ll dive into what makes this timepiece a collector’s dream and a testament to Breguet’s enduring legacy.

A Nod to Tradition with Modern Refinement

Introduced in the 1980s during a period of revival for the brand under the stewardship of the Chaumet brothers and master watchmaker Daniel Roth, the Breguet Perpetual Calendar 3050BA is a watch that bridges the gap between classic design and modern functionality. Encased in a svelte 36mm 18k yellow gold case, it features the signature Breguet coin-edge pattern along the mid-case—a cold-worked detail that speaks to the meticulous craftsmanship of the era. At just 8mm thick, the watch exudes an understated elegance, making it a perfect fit for formal occasions while still commanding attention with its intricate complications.

The dial is a masterclass in balance and legibility, a hallmark of Breguet’s Classique line. Featuring a silver guilloché pattern—a hand-engraved technique that adds texture and depth—the 3050BA displays its perpetual calendar functions with remarkable clarity. Four sub-dials gracefully present the leap year and month at 12 o’clock, the day at 9 o’clock, the date at 3 o’clock, and a poetic moonphase at 6 o’clock. Framing it all is a brushed chapter ring adorned with Roman numerals, complemented by the iconic blued Breguet hands that have become synonymous with the brand’s aesthetic. It’s a layout that manages to pack a wealth of information into a compact space without ever feeling cluttered.

The Heart of the Matter: A Perpetual Calendar Movement

What truly sets the 3050BA apart is its perpetual calendar complication, a mechanical marvel that automatically adjusts for the varying lengths of months and even accounts for leap years. This means the watch requires no manual correction until the year 2100, when the Gregorian calendar skips a leap year—an impressive feat for a timepiece from the late 20th century. Housed within its slim case is an automatic movement, often based on the Frédéric Piguet 71 caliber, known for its reliability and precision. Some versions of the 3050BA feature a solid case back, while others, like the closely related 3057BA, offer a sapphire crystal window to showcase the hand-engraved rotor and movement—a treat for enthusiasts who appreciate the artistry behind the mechanics.

Neo-Vintage Appeal in a Modern Market

The Breguet 3050BA occupies a unique space in the world of luxury watches: it’s a neo-vintage piece, hailing from an era when mechanical watchmaking was experiencing a renaissance after the quartz crisis. Today, as sporty chronographs and oversized designs dominate the market, this perpetual calendar offers a refreshing alternative. Its modest 36mm size and dress-watch sensibility hark back to a time when elegance trumped ostentation, making it a standout choice for collectors seeking value and sophistication without the inflated hype of more mainstream models.

Condition is key with neo-vintage watches, and the 3050BA often surfaces in excellent shape, thanks to its original owners’ appreciation for its craftsmanship. Many examples come with their full sets—original boxes, papers, and even the special gold setting stylus used to adjust the complications—adding to their allure. Prices for this reference can vary widely, from around $28,000 to upwards of $58,000 depending on condition, provenance, and whether it’s a rare first-series piece, but it remains a compelling option in the realm of high-end perpetual calendars.

Why the 3050BA Endures

There’s something timeless about the Breguet Perpetual Calendar 3050BA. It’s not just the technical prowess of its movement or the beauty of its design—it’s the way it embodies Breguet’s centuries-old philosophy of blending innovation with tradition. In an age where watches are often judged by their boldness or rarity, the 3050BA quietly asserts its excellence through restraint and refinement. It’s a reminder that true luxury doesn’t need to shout; it simply endures.

For collectors, the 3050BA represents an opportunity to own a piece of Breguet’s modern history—a watch that carries the DNA of Abraham-Louis Breguet’s genius while reflecting the ingenuity of its 1980s revival. For enthusiasts, it’s a chance to wear a conversation starter that’s as functional as it is beautiful. Whether you’re drawn to its historical significance, its mechanical complexity, or its sheer elegance, the Breguet Perpetual Calendar 3050BA is a timepiece that continues to captivate, decades after its debut.

Final Thoughts

As we move further into 2025, the Breguet Perpetual Calendar 3050BA remains a shining example of what makes watchmaking an art form. It’s a celebration of precision, a nod to heritage, and a subtle statement of style—all wrapped in a package that feels as relevant today as it did in the 1980s. If you’re in the market for a watch that offers both substance and soul, this Breguet masterpiece deserves a closer look. After all, in a world of fleeting trends, there’s something profoundly satisfying about a timepiece that’s built to last—quite literally—until the next century.

This rare Breguet Perpetual Calendar Moonphase 3050BA is in exceptional condition and available here.

Patek Philippe has a long and illustrious history of crafting timepieces that are not only functional but also works of art. The Patek Philippe 5307P is a prime example of this philosophy. This Grand Complication watch features a perpetual calendar, tourbillion and minute repeater, a combination of complications that are each complex and highly sought-after alone but together they make for a true holy grail for collectors

A Closer Look at the Patek Philippe 5307P

Released in 2013, the 5307P features a stunning platinum case that measures 41mm in diameter. The case is beautifully polished and features a slightly curved profile that hugs the wrist comfortably. The bezel features 40 high quality baguette cut diamonds. 

The dial of the 5307P is a masterpiece of watchmaking artistry. It is made of an opaline lacquer and features applied baguette diamond markers and dauphine hands. The dial features a perpetual calendar complication, which displays the day, date, month, and leap year digitally in an easy-to-read format. The leap year, moonphase and day-night indicator are located near five, six and seven o'clock respectively. 

The 5307P is powered by the Patek Philippe Calibre R TO 27 PS QI. This manually wound movement is a masterpiece of engineering in its own right. Featuring a Gyromax® balance and instantaneous perpetual calendar with day/night indicator, this impressive movement offers a 48 hour power reserve. The movement is visible through the sapphire crystal caseback, allowing the wearer to admire its intricate beauty and watch the tourbillon and repeater hammers in action when struck. 

This Grail

The Patek Philippe 5307P is a watch that is more than just a timepiece; it is a work of art. It is a testament to the skill and artistry of the watchmakers at Patek Philippe, and it is a watch that is sure to impress even the most discerning collector. This example of one of very few made and comes complete with all of the original accessories. 

History

Just two years after the Stern family acquired the brand, Patek Philippe introduced the Reference 130 as their first serially produced chronograph. Launched in 1934 as a monopusher chronograph, the Reference 130 was quickly redesigned as a two button chronograph within a few years. Over the subsequent thirty years, fewer than 1,500 watches were made across all metals in a variety of dials, with even fewer surviving today.

 Photo from AdPatina

The Movement 

The reference 130 initially used ébauches (unfinished movements) from Victorin Piguet, but Patek Philippe soon transitioned to a hand-wound Valjoux caliber, which they then upgraded and named the Calibre 13-130.

This Grail 

Finding an original condition Patek Philippe 130 is difficult; discovering one that was retailed by Tiffany & Co. with the retailers name on the dial is a once in a lifetime opportunity. This Reference 130 was originally manufactured by Patek Philippe in 1950 and sold in February of 1951 by Tiffany & Company. It is in ideal vintage condition, unmolested with typical minor wear, a sharp, full case and clean original dial.

If you have questions about purchasing, please inquire:  

privateSale@thekeystone.com or +1-213-632-9061

The challenge with creating a waterproof chronograph lay in the pushers, which is why the pushers on the 1463 differ from the 130 and 530. These round pushers featured attractive decorative ends that inspired the nickname "tasti tondi" by modern collectors. Tondi (or singularly, Tondo) is circular artwork created during the Renaissance era, short for the Italian word "rotondo or "round."

In keeping with its remarkably robust design, the Tasti Tondi ref. 1463 not only features a larger and more decorative pushers than its predecessors, but also a screw-down caseback - a large upgrade from the snap-on caseback that preceded and succeeded it for the better part of 60 years in Patek Philippe's lineage of beautifully styled chronographs. Produced until 1979 or 1980, depending on the source, the Tasti Tondi ref. 1463 saw less than 750 examples join its ranks, with white dials seemingly dominating the landscape. 

This example, in yellow gold, features a phenomenal case with thick lugs, deep hallmarks and little sign of wear. An obvious highlight is the attractive dial with rare Breguet numerals and a wonderful vintage patina. 

This watch comes with an Extract from the Archives noting the Breguet numeral dial and a 1949 production and 1950 sale.

The bracelet comfortably wraps around the wrist and the spring-loaded cover pull back for the wearer to subtly check the time.

According to the Extract from the Archives at Patek Philippe, this watch was made in 1961 and sold in February of 1962. In total, the watch features 127 baguette-cut diamonds (22.02ct) and 67 round diamonds (22.92ct).

Learn more about this incredible watch from one of the most knowledgable Patek Philippe specialists in the world, John Reardon: 

The Patek Philippe Grand Complication Ref. 5316P is a watch that transcends mere timekeeping. It is a work of art, a masterpiece of watchmaking, and a testament to Swiss ingenuity. With its sleek platinum case, black enamel dial, and symphony of complications, the 5316P is a watch that demands attention and respect.

Patek Philippe has been synonymous with luxury watchmaking for over 180 years. The company is known for its meticulous attention to detail, its use of the finest materials, and its commitment to innovation. The 5316P is no exception. Every aspect of the watch, from the hand-finished movement to the 40mm platinum case, is crafted with the utmost care and precision.

A Trio of Grand Complications

The 5316P is not just a pretty face. It is also a highly complex watch that houses three of the most sought-after complications in watchmaking: a minute repeater, a perpetual calendar, and a tourbillon.

• Minute Repeater: The minute repeater allows the wearer to tell the time by sound. When activated, the watch chimes the hours, minutes, and seconds with a series of delicate gongs. The 5316P's minute repeater is one of the finest in the world, known for its clarity and purity of tone. At Patek Philippe, Minute Repeaters go through a thorough process of inspections and quality control to ensure only perfect results leave the shop for their best customers. 

• Perpetual Calendar: The perpetual calendar is a mechanical marvel that automatically keeps track of the date, even during leap years. The 5316P's perpetual calendar is accurate for over 400 years, making it a truly timeless piece.

• Tourbillon: The tourbillon is a device that counteracts the effects of gravity on the watch's movement, ensuring greater accuracy. The 5316P's tourbillon is visible through the back of the case, allowing the wearer to admire its intricate mechanics.

The Patek Philippe 5316P is more than just a watch; it is a work of art. It is a testament to the skill and dedication of the world's finest watchmakers. It is a symbol of elegance and sophistication. If you are ever lucky enough to see one in person, take a moment to appreciate its beauty and complexity. You will not be disappointed.

This Patek Philippe Grand Complication 5316P is available now at The Keystone. 

Patek Philippe is a brand that is synonymous with craftsmanship and the finest grand complication watches. The Swiss watchmaker has been producing some of the world's finest watches for over 180 years, and its commitment to excellence is evident in every timepiece it creates. One of the most exceptional watches produced by Patek Philippe is the 5216, a grand complication wristwatch that is considered one of the most complicated watches ever made by the brand.

The Patek Philippe 5216 is a grand complication wristwatch that was first introduced in 2015. It is powered by the Caliber R TO 27 PS QR movement, which is a manually wound movement that has been developed entirely in-house by Patek Philippe. The watch is housed in a platinum case and features a stunning black enamel dial with white gold applied hour markers.

The calendar displays the date, day of the week, month, and leap year cycle, and it only requires adjustment once every 400 years. The moon phase display adds to the watch's elegance and sophistication, and it is accurate to within one day every 122 years.

On top of that, the 5216 also features a minute repeater function, which chimes the time on demand. The chimes are produced by two hammers striking a gong, and the sound is both beautiful and complex. The minute repeater function is considered one of the most challenging complications to produce in a wristwatch, and its inclusion in the 5216 is a testament to Patek Philippe's commitment to excellence.

The watch is finished with a black strap and platinum deployant clasp, adding to its luxury appeal. The watch features a sapphire crystal case back that allows you to admire the intricate movement. 

In terms of design, the Patek Philippe 5216 is a true work of art. The platinum case is polished to perfection, and the black enamel dial with white gold accents is both elegant and understated.

This reference is a true collector's item and a watch that will be passed down from generation to generation.

We are proud to offer an exceptional example, complete with original box, papers and second solid caseback. 

Sitting comfortably within horology’s famous “Holy Trinity,” Patek Philippe’s reputation as a high-end watchmaker is certainly undisputed. Famed for their classical timepieces and incredible craftsmanship, it is no surprise that Patek likes to flex their horological muscles from time to time and create a timepiece that demonstrates just how good they are at their craft. Released to fulfill that exact role, the Philippe Grand Complication Minute Repeater Chronograph Perpetual Calendar ref. 5208R that we have here is perhaps one of the most impressive watches Patek has created in modern times.

First launched in 2011 with a distinctively monochromatic aesthetic thanks to pairing a platinum case and sunburst grey dial, the ref. 5208 was well-received by collectors. Offered only to Patek’s best VIP clients and incredibly complex, the ref. 5208 was widely accepted as one of Patek’s most important modern references. Fitting within Patek’s Grand Complication collection, the ref. 5208 combined three of Patek’s signature complications, the perpetual calendar, the monopusher chronograph, and the minute repeater, in one watch for the very first time. A goliath within the pantheon of high-end watchmaking, the ref. 5208 pushed technical boundaries in a manner that only Patek’s jaw-dropping horological talents could manage.

Following the platinum ref. 5208 variant’s discontinuation in 2018, Patek made way for the reference we see here, the ref. 5208R, which debuted in the same year. Featuring a 42mm 18kt rose gold case, the ref. 5208R is a physically impressive watch on the wrist. Marrying a polished construction with skeletonized lugs and an elegant domed bezel, the ref. 5208 is classical in its design, as one would expect from Patek Philippe. Impressively thin at 15.11mm tall, considering its extraordinarily complicated 719-part automatic cal. R CH 27 PS QI movement, the ref. 5208R epitomizes Patek Philippe’s mission as a luxury watchmaker. Of course, as per this mission, the ref. 5208R’s movement is finished to near perfection and viewable through its sapphire crystal caseback.

Much like its predecessor, the ref. 5208R is executed in a monochromatic fashion, with its striking sunburst black ebony dial sporting 18kt rose gold hours markers that match its 18kt rose gold construction and hand-stitched black alligator leather strap. Further tying its rose gold construction with its dial, the ref. 5208R also boasts beautiful 18kt rose gold frames around each of its day, date, and month apertures, and 18kt rose gold hour, minute, and running second hands.

A wonderfully legible timepiece, the ref. 5208R features three balanced subdials, which reflect its incredible complexity. With elegant white chapter rings surrounding each of the chronograph subdials and a white leap year indicator within its 60-minute subdial, the ref. 5208R enables each of its complications to be read with ease. On top of its impressive list of complications, within its running seconds subdial at 6 o’clock, the ref. 5208R also has a subtle moon-phase indicator which links the ref. 5208R to so many of Patek Philippe’s legendary Grand Complication timepieces that came before it.

With its minute repeater's slider positioned at 9 o'clock and its chronograph's pusher sitting at 2 o'clock, the ref. 5208R is just as wonderfully balanced in its physical design as its aesthetic and engineering. Demonstrating just how harmoniously designed an incredibly complex timepiece can be from top to bottom, the ref. 5208R is impressive in every way possible, and we're proud to have such a horological heavyweight in our midst here at The Keystone. 

Patek Philippe’s catalog of incredible inventions, industry firsts, and iconic timepieces certainly does not need an introduction. Across their long history, they have created horological masterpieces that most watchmakers can only dream of, and the World Time Minute Repeater ref. 5531 is another one of those timepieces. Initially launched in 2017 as a special edition of just ten pieces, it was expanded as a permanent addition to Patek’s arsenal in 2018. Combining and celebrating two of Patek’s best-known and most emblematic complications, their signature World Time complication and the orchestral Minute Repeater, in a way no watchmaker had ever done before, the ref. 5531 demonstrates just how special Patek Philippe is as a modern watchmaking powerhouse.

Indeed, with its minute repeater, the World Time Minute Repeater ref. 5531 beautifully chimes the time on command as one might expect, but for the first time in horology, the ref. 5531 is capable of chiming the local time in any of its 24 timezones, thanks to some innovative watchmaking. Powered by the 8.5mm thick and immaculately finished automatic cal. R27 HU, the ref. 5531’s world time mechanism continuously advances the hour snail cam and allows the minute repeater to chime the time in whatever timezone is displayed at 12 o’clock, the local time. This is a significant improvement on traditional minute repeaters, whereby a 12-pointed star wheel drives the hour snail cam. This 12-pointed wheel is then advanced one tooth per hour by the minute snail, which is itself driven by the motion works. As a result, the ref. 5531 is a remarkable solution to a complex problem – something Patek Philippe is a master at achieving.

With the cal. R27 HU movement displaying its immaculate finishing beneath the ref. 5531’s exhibition caseback, it is no surprise Patek have opted for an equally opulent construction for the ref. 5531. Indeed, the timepiece boasts an 18kt rose gold 40.2mm case with a polished stepped bezel and distinctive openworked lugs that provide an unencumbered view of the clous de Paris guilloché encircling its entire mid-case. With its winding crown at 3 o’clock, world timer pusher at 2 o’clock, and minute repeater slide at 9 o’clock, the ref. 5531 is a beautifully balanced watch on the wrist and, indeed, is aided by its impressively thin 11.49mm profile. Considering the complexity of its movement, getting the ref. 5531 to be just 11.49mm tall is quite the achievement.

Aside from the complexity of its movement, and the angelic sound of its incredible minute repeater’s chime, perhaps the star of the show, is the ref. 5531’s immaculate dial. Featuring a Cloisonné enamel center, the ref. 5531’s dial depicts a boat sailing on Lake Geneva in the Lavaux region. Famed for its vineyard terraces that stretch over 30 kilometers and have earned UNESCO world heritage site designation, the ref. 5531 is artistry in more ways than one. While its credentials as a micromechanical masterpiece are undoubtedly impressive, the ref. 5531’s dial is a breathtaking display of Patek Philippe’s talents. With 18kt rose gold hour markers punctuating the dial into quarters and a subtly compartmentalized city disk offering a discreet pattern to complement its otherwise free-flowing design, the ref. 5531 acts as a beautiful celebration of two of Patek Philippe’s best-known complications and two of Switzerland’s best exports - intricately constructed timepieces and wine made from grapes grown in some of Europe’s most beautiful landscapes. 

Today we are proud to offer this highly limited and rare Patek Philippe Cloisonné World Time Minute Repeater Ref. 5531R for sale. 

Renowned for their uncanny ability to think outside of the box and successfully execute on ideas that many other watchmakers would consider too significant a risk, Audemars Piguet are rightfully heralded for their avant-garde timepieces that challenge horological boundaries. However, while models like the Royal Oak and its cousin, the Royal Oak Concept, immediately come to mind as unique models that challenged the industry's norms when they were launched, there is one AP model that fits the same bill and is still relatively unknown, the Star Wheel ref. 25720. Having directly influenced and inspired modern brands like Urwerk with its unique layout, its place within AP's hallowed halls as yet another trend-setting timepiece is all but secured, and we are lucky enough to have two examples in stock, the 18kt yellow gold ref. 25720BA and the platinum ref. 25720PT. 

Launched in 1991, the Audemars Piguet ref. 25720 Star Wheel was rather unconventional for the 1990s, given the seismic shift that occurred with the proliferation of large sports watches, which Audemars Piguet themselves caused by releasing the Royal Oak in the 1970s. Taking inspiration from a rather unlikely and unusual source, as always, AP designed the Star Wheel with the wandering hours complication in mind, which dates back to the late 17th century. This inspiration was executed through the use of three sapphire disks that rotate across the northern-most 120-degree hemisphere of the dial. 

The minutes are displayed in black on a white linear track that sits across the upper portion of the dial spanning between where 10 o'clock and 2 o'clock would be on a traditional display. Each sapphire disk passes over this white minute indicator and displays the hour as it passes across. With three different disks, as one disk finishes passing over the minutes track, the next follows with the third in the bottom portion of the dial, thus highlighting the cyclical nature of time in a manner that is representative of how time was initially tracked; the sun's movement across the sky. 

The effortlessly luxurious Star Wheel ref. 25720 is produced only in precious metals, in extremely limited quantities, and features a stepped bezel and short lugs with a polished surface across the entirety of its construction. Measuring a svelte 36mm in diameter and a 9mm thickness, the Star Wheel is a classically designed timepiece, in keeping with its most traditional of inspirations. Indeed, this sizing further flies in the face of the prevailing watch designs during the 1990s, going to prove that the Star Wheel was not a timepiece designed for the masses but rather a horologically inclined clientele. 

Providing a wealth of fine details to get lost within, the Star Wheel also features a stunningly well-executed guilloche dial that adds a further level of high-end watchmaking to its already mesmerizing display. Offered in silver on the platinum variant and gold on the yellow gold variant, the Star Wheel's dial results in an aesthetic that is rather monochromatic and thus allows its wearer to focus on the finer details. Alongside this stunning guilloche pattern is the all-white minutes track, which is then contrasted entirely by the central mechanics that drives the three sapphire disks. 

Powered by the automatic cal. 2224, which is also visible behind the Star Wheel's exhibition caseback, the movement displays hand-finishing throughout, as pleasurably viewable through the Star Wheel's dial. With angling, polishing and sand-blasting throughout, this blend of mechanical textures adds to its already intriguing display, resulting in an utterly captivating timepiece. While one might expect this level of forethought and attention to detail from a member of watchmaking's Holy Trinity, it's always a pleasure to enjoy nonetheless. One of their most unique offerings, the Star Wheel is the physical embodiment of AP's desire to create horological masterpieces whenever possible. With its unusual inspiration and unique design, it has rightfully become one of the most sought-after offerings, and we are proud to have two different examples available at The Keystone, one in platinum and the other in yellow gold.  

Famed for their typically restrained designs, utilitarian robustness, and methodical approach to updating their collections, Rolex has long been considered as a relatively conservative watchmaker. However, with that said, Rolex does sometimes release variants of their designs that can be opulent, luxurious, and a general departure from what they know best. These timepieces quickly become some of the Genevan Giants' most sought-after pieces, and the Rolex 'Rainbow' Daytona is undoubtedly the poster child of these bejeweled beauties, with demand emphatically outstripping demand. 

While it certainly isn't the first time diamonds donned the Daytona, that would be in the early 1980s with the ref. 6269 and 6290, the ref. 116598RBOW and 116599RBOW were launched in tandem at Baselworld in 2012 to a rather impressed public. Fitted with a tachymeter-negating gem-set bezel and dial and a diamond-encrusted case, these two references imbue the idea of luxury in the most vivid manner possible. With only a handful produced every year, these timepieces have become icons in their own right, with collectors used to getting what they want placed on lengthy waiting lists - if they are lucky and market values far exceeding the retail price of either variant. 

While the craftsmanship across the two references' 18kt white and yellow gold cases is undoubtedly incredible, and their dials and cases are diamond-set with the utmost precision, their rainbow bezels are what truly steal the show, as their reference numbers suggest. Featuring 36 baguette-cut graduated sapphires that range across the entire color spectrum with minor changes from shade to shade, these two timepieces are mesmerizing to cast your eye over. In watchmaking, we are typically spoiled with some incredibly luxurious designs, but the ref. 116598 and ref. 116599 push these boundaries to new heights. 

With an impeccable level of uniformity across their size, color, cut, and clarity, each example's stones are hand-picked and color-matched using machines usually found only in gemological laboratories. This is so that the stones on each bezel seamlessly blend into their neighboring stone and thus makes it impossible to define where one color starts and the next ends - just like a rainbow, as luck may have it. Furthermore, in a type of homogeneity that only watchmakers like Rolex can produce, each 'Rainbow' Daytona's bezel sports the same colors as the other examples within the collection. As a result, production is laborious, slow, and incredibly tedious, thus naturally creating an excessively rare timepiece - just as watch collectors like it.

Both offered with black lacquered dials; each of our examples offer diamond-set indices with construction-matching subdials, as was the standard for early examples like ours. While the collection has evolved to include an 18kt rose gold model and feature variants with bezel-matching rainbow sapphire-set dials, gem-set bracelets, and even a pavé dial too, both of our examples offer a more understated and sophisticated aesthetic. Thus, our examples manage to tone down the 'Rainbow' Daytona's gem-set design while still offering the truly exceptional level of unadulterated luxury that Rolex has so clearly demonstrated that they can produce to the highest standard possible. 

An unprecedented watch in terms of its history, design, and standing amongst the horological purists, the Daytona has long been one of watchmaking's best-known watches. With variants like the "Rainbow' Daytona, the Daytona has escaped its automotive-inspired tool watch distinction and become a watch that offers both a spectacular level of luxury along with Rolex's masterful watchmaking. Powered by the very same automatic cal. 4130 movement as all of its post-2000 siblings, the 'Rainbow' Daytona is as functionally competent as any other variant, in keeping with Rolex's desire to produce timepieces that are functionally robust in every way feasible. As stunning as they are reliable, the 'Rainbow' Daytona is one of the most sought-after Rolex models for a reason, and we can't get enough of them here at The Keystone. 

Launched in 1972 and produced for eight years until 1980, the Patek Philippe ref. 3580 is a watch unlike any the brand had created at the time, and certainly remarkably dissimilar to any modern watch that they produce today. Emerging from the creative design era that was the 1970s, the ref. 3580 spans borders Patek traditionally would not cross. Made of stainless steel, a rather unusual material for Patek to use, particularly at the time, the ref. 3580 explored new territory for the Genevan Giants by engaging in a design language that the brand had not yet explored.

Besides its construction material, what makes the ref. 3580's 35mm case so unusual for Patek was its distinctive shape. Oval at first glance, the ref. 3580's case is somewhat squared-off in its four corners, making it slightly more tonneau-shaped upon second inspection. While undoubtedly distinctive from the onset, the ref. 3580's shape is perfect on the wrist as the watch comfortably slots into the divot behind your hand. Aiding its ease of wear on the wrist and forming a core tenet of its aesthetic is the ref. 3580's physical continuity across the border of its case. 

While the vast majority of timepieces feature cases with lugs that attach to their bracelets or straps and winding crowns with crown guards to protect them, the ref. 3580 is entirely unscathed by such norms. Instead, the ref. 3580 implements its strap attachments and winding stem from behind its case, thus allowing its tonneau-shaped case's border to be uninterrupted. A cosmetic choice by nature, this shift in design compounds upon the ref. 3580's unique and comfortable case size and shape, thus enabling the ref. 3580 to wear on the wrist, unlike nearly any other watch. 

Inspired by the technological age that was setting upon watchmaking at the time of the ref. 3580's issuance, Patek wanted the ref. 3580 to look just like a battery-operated watch - unencumbered by tasks like winding or time-setting. As such, they fitted the ref. 3580 with the automatic back-wind cal. 350 movement (and the cal. 1350 later on in its production) with a winding crown that folds flat to the ref. 3580's caseback. A symbol of modernity, progress, and technical innovation, the ref. 3580 is a beautiful testament to Patek and their willingness to step out of their comfort zone and seek inspiration in some of the most unusual places - like battery-powered watches.

Already a rare watch just by virtue of its status as the only back-wind stainless steel Patek Philippe model, the ref. 3580 is even objectively rare too, with just 500 examples estimated to have been produced over the reference's 8-year lifetime. Sporting a simple silver dial with applied hour markers, the ref. 3580 is a watch that is perhaps one of Patek Philippe's most stylistically consistent designs ever. As such, it is immediately recognizable for its unique look on the wrist, and unique place within Patek Philippe's history books.

While Rolex originally ran three references of Submariner from the get-go, Tudor only released one. However, with its no-frills attitude to watchmaking, Tudor’s tactic of using third-party sourced movements to power their Submariner proved to be popular as militaries around the globe like the French, the U.S., South African, Italian, and more all used the Tudor Submariner at some point for their divers and Navy. Henceforth, the Tudor Submariner became one of the leading military dive watches with its robust construction, less expensive price tag, and more easily serviceable ETA movement, all being pros that institutions such as military organizations loved for enabling them to stay on budget.

In 1975, the Tudor Submariner ref. 9401 was released with a new generation of movement, the ETA cal. 2776 and the cal. 2784, which featured the date. Offered in either blue or black, the ref. 9401 was the last Submariner to feature the iconic Snowflake dial, which has since become one of Tudor’s most defining characteristics. Today, the Tudor Submariner lives on through the Black Bay collection, with several other collections paying homage to the Submariner’s snowflake dial.

Offered here is a black dial no-date variant of the ref. 9401 in stunning condition with a deep and even yellow patina having developed on its luminous hour markers and hands. Featuring a jet black aluminum bezel insert to match its black dial, this example is a truly stunning piece on the wrist as it exudes vintage charm across the entirety of its beloved design.

Following the adoption of Rolex's Oyster case and automatic movements during the '40s, Tudor began to venture into tool watch territory like dive watches - where they found great success, and eventually chronographs, just like the Monte Carlo “Homeplate” ref. 7032 that we have here. Launched in the early 1970s as Tudor’s first chronograph, the Tudor Monte Carlo has evolved into one of Tudor's most recognizable models thanks to its unique aesthetic and similarities to its older sibling, the Rolex Daytona. With Tudor becoming an increasingly independent brand, these vintage models have experienced a surge in popularity over the last few years as collectors begin to appreciate them for what they are as unique timepieces that deserve to be enjoyed without comparison to their big brother brand.

Built from Rolex parts, it is no surprise that the Monte Carlo ref. 7032 is an incredibly robust timepiece, even considering its age - with some modern creature comforts built into its design. Featuring a trip-lock Rolex crown, substantial squared-off crown guards, screw-down pushers, and stainless steel tachymeter-engraved bezel, the Monte Carlo can withstand daily wear and tear much unlike the fragile chronographs from its period. Featuring a 39mm stainless steel case, it carries the wrist presence and substance to fit modern tastes perfectly. However, thanks to its aesthetic, it features a vintage charm often searched for by brands and collectors alike, as demonstrated by the success of the countless re-editions we have had in recent years.

With value at the heart of Tudor's mission, the Monte Carlo ref. 7032, much like every other Tudor, features a third-party movement, the manual-wind Valjoux cal. 7734. Featuring a running seconds subdial at 9 o'clock and a 45-minute subdial at 3 o'clock, this robust cam-level chronograph movement provided utility and a visual break from the Daytona's triple register design. Furthermore, with a date aperture at 6 o'clock as highlighted by its cyclops lens, the Monte Carlo forges its own identity on the wrist rather confidently, highlighting its bold aesthetic and unique design.

Perhaps the Monte Carlo's most unique aspect is its dial; with its "Monte Carlo" nickname inspired by its visual similarities to a roulette wheel, the Monte Carlo's dial injects personality and color into the timepiece with precision and accuracy. A calculated aesthetic, the Monte Carlo's dial uses color in a helpful fashion while also providing a unique character to the timepiece overall. While the Monte Carlo’s nickname is used throughout the entire collection, the “Homeplate” nickname used for the ref. 7032 is exclusive to it, and the ref. 7031 due to their baseball homeplate-shaped hour markers.

Offered in exquisite condition, the example we have here is the rare black dial variant. Tudor experimented with both black and grey dials during early production before deciding on grey for the rest of Monte Carlo’s production. As such, black dial examples are incredibly scarce. With its original oyster bracelet, beautiful black dial, and stunning steel bezel, this Tudor Monte Carlo “Homeplate” ref. 7032 will make for an excellent addition to any discerning timepiece enthusiast’s collection.

Famed for its status as one of the most iconic aviator wristwatches of all time, the Rolex GMT-Master was released in 1954 as the ref. 6542. With its blue and red bi-directional bezel and second hour hand, the GMT-Master improved the ability of pilots to navigate the skies and communicate to ground control in various time zones across the globe. As the watch continued its march through the decades, it evolved and became the GMT-Master II as we know it. However, during that evolution, one crucial step enabled the collection to include precious metal variants, the "SARU" ref. 16758.

Launched circa 1980, the SARU was the first Rolex sports watch to feature precious gemstones with a bezel featuring blue SApphires and red RUbies in the same color scheme as its conventional "Pepsi" bezel siblings with diamonds punctuating every fifth minute. Perhaps one of the rarest GMT-Master variants to be produced with just a handful of models produced during the 1980s, the SARU is also lavishly adorned with diamonds down the entirety of its bracelet's center links and covering its entire dial in a pavé setting. Adding to its exclusivity, the SARU also features a bracelet that we would not expect on any GMT-Master, the Presidential bracelet, most commonly spotted on the incredibly exclusive Day-Date collection – an icon in its own right.

An incredibly daring and avant-garde design for the time, the SARU broke from convention as a precious metal tool watch. Including its gem-encrusted construction, the SARU truly defied the industry and set it on the course we are on now, with models akin to the SARU coming into popularity amongst several watchmaking brands. A real trend-setting watch, the SARU is important not only for its beautiful craftsmanship, detailed design, and heritage as a GMT-Master, it is important for its contribution to modern watchmaking as we know it. 

Today we are proud to offer one of the few Rolex GMT-Master "SARU" ref. 16578 examples that have shown up for public sale. Dated to 1984, our example is presented in phenomenal original condition with deep hallmarks throughout the reverse of its case a beautifully consistent patina throughout. Retaining its original caseback sticker, our example has clearly been cared for during its life as its position as an exceptional timepiece has been apparent throughout its lifetime. 

Patek Philippe Perpetual Calendar Ref. 3450

In production since the 1920s, Patek Philippe's credentials regarding their perpetual calendar models are indisputable, much like their claim over many other areas within watchmaking. While their perpetual calendar models are truly iconic, Patek Philippe had never featured one of the perpetual calendar's most vital aspects in any of their wrist watches until 1981, the leap year indication. Introducing the leap year indicator to Patek Philippe's perpetual calendar line-up in 1981, the ref. 3450 is not only important as the common ancestor linking Patek Philippe's previous perpetual calendar models to their modern references; it is also exceptionally rare. Throughout its incredibly short five-year production run lasting until 1985, only a total of 244 examples were produced, one of which we have on offer here. 

Modeled off of its predecessor, the ref. 3448, the ref. 3450 features a round case design with a smooth bezel, sharp faceted lugs, and an exceptionally legible dial with immaculate symmetry disturbed only by its signature leap year indicator found at 3:30. Offered almost exclusively in 18kt yellow gold, the ref. 3450 measures in at a relatively modern 37.5mm in diameter, making it a large dress watch for the time of its release and a perfectly proportioned timepiece for today's standards. Powered by Patek Philippe's automatic perpetual calendar movement, the cal. cal. 27-460QB, the ref. 3450 carries another link back to its perpetual calendar lineage as this movement was modeled after the cal. 27-460, itself released in 1962 and evolving from another perpetual calendar movement that goes as far back as 1953. 

Presented in fantastic original condition, the example we have here is found with deep hallmarks, sharp edges throughout, and its original untouched surface. Together, these factors indicate the care this timepiece's previous owners took to ensure their watch was preserved as we see it today. With its beautiful silver dial in unspoiled condition, our 1983 example is almost exactly as it was on its original day of purchase. Offered on its original black leather Patek Philippe strap with its correct 18kt yellow gold Patek Philippe buckle, this immaculate Patek Philippe Perpetual Calendar ref. 3450 will comfortably stand as the crown jewel of your collection, merging vintage-inspired heritage with modern creature comforts in its contemporary sizing, scratch-resistant sapphire crystal, and signature leap year indicator.  

For more photos and details of this example, please visit our listing here. 

The 5970 was introduced in 2004 and was a significant redesign of the perpetual calendar for Patek. At 40mm, the new case was quite large compared to its predecessor, the 3970, but the watch boasts the same Lemania-based movement. The 5970 was produced from 2004 to 2011, the shortest production run of any Patek Perpetual Calendar Chronograph, and followed by the 5270.

Approximately 2,800 of these perpetual calendar chronographs were made was made in four metals: yellow gold, white gold, rose gold and platinum. While the platinum model is regarded as the most desired, the yellow gold version is believed to be the most rare. 

Regardless of metal, if you are lucky enough to get your hands on a 5970, you will quickly understand why Hodinkee wrote “Some call it the best watch Patek Philippe ever made. Some describe it as perfectly proportioned. Others call it the last of the great Patek Philippes.”

To see our available Patek Philippe watches, including the 5970, click here.

The Patek Philippe Perpetual Calendar Minute Repeater Ref. 5074

The Patek Philippe Perpetual Calendar Minute Repeater Ref. 5074 is among the most aesthetically pleasing and technically impressive watches Patek Philippe has ever made. Patek Philippe’s Perpetual Calendar complications alone are worth significant note and are certainly among the best in the industry, however the quality of the illustrious brand’s Minute Repeaters are in a league of their own. Of those spectacular minute repeaters, there are only a few that boast “cathedral gongs,” chimes that ring out a particular sweet and powerful sound: the Sky Moon Tourbillon, 5374, 5178 and the 5074. 

The Process

In an article published by The Hour Glass, David Chan explained the detailed and extensive process of bringing a Patek Philippe Minute Repeater to life: 

 “The process for a Patek Philippe minute repeater to pass muster is such: the single watchmaker who works on the repeater from beginning to end – typically 200 to 300 hours of assembly, excluding further optimization – approves it by him-, or herself; it then proceeds to a anechoic, echo-free chamber, where the parameters of its chimes are recorded and computationally analyzed against the template of previously approved and archived repeaters, ensuring continuity in the acoustic qualities across all Patek chiming watches. The repeater is then presented to the head watchmaker overseeing the chiming complications, and then finally – and most famously – to Thierry Stern, President, for his approval; in the same way as it was presented to the ear of his father and grandfather before him.” 

Cathedral Gongs

A minute repeater compilation operates with three main components; the watchcase, which acts as a resonance chamber; the hammers that strike the gong; and the gongs which give off the sweet sound. The “gongs” of the minute repeater are thin wires that circle the movement. When the two hammers, visible through the caseback, strike, they are striking those wires or gongs. A traditional repeater gong circles the movement once, while Cathedral Gongs circle the movement two times, making it twice as long for a better sound. 

Design

The case of the Patek Philippe 5074 is similar to the other 507x references, most commonly seen is the 5070. At 42mm, the case does offer some heft but the traditional design elements with the flat, stepped bezel and straight lugs make the watch timeless and wear nicely. The dial’s arabic numerals and well balanced subdials also give the watch a very classic, vintage feel and look fantastic.

Production 

The Patek Philippe 5074 was first released in 2001 in yellow gold which was replaced in 2005 with pink gold followed by platinum which was introduced in 2009. It has been reported that fewer than 40 rose gold examples were ever made and fewer than 25 in yellow gold. 

Collecting 

If you are a passionate collector of complicated Patek Philippe watches, the 5074 needs to be on your radar. This is one of the most attractive, technically amazing and special minute repeaters that Patek Philippe has ever made. Couple that with the rarity and labor intensity it takes to create such a special piece, and you have an undeniably special watch. 

At The Keystone, we are currently offering the two examples shown in this post. Both unworn and complete with original box and papers, we are offering the Rose Gold 5074R and the Platinum 5074P. 

The design of the 5016 perfectly bridges the gap between the vintage references seen throughout the brand’s almost two century history and todays more innovative creations. The dial beautifully displays a plethora of information including the day, date, month, year, moon phase and leap year. 

 We currently have a platinum Patek Philippe Minute Repeating Tourbillon 5016 available here.

Key features: 

• Retrograde Perpetual Calendar - A retrograde calendar displays each day on a linear path, in this case nearly 3/4 of a circle, and then the date hand jumps backwards to “1.” A “perpetual calendar” accounts for changes in the dates on leap years so that it will remain accurate in perpetuity. 
• Tourbillon - The tourbillon complication is a watch escapement that was created for carriage clocks to negate the effects of gravity on movements that sit stationary. 
• Minute repeater - Patek Philippe is considered by many to be the king of minute repeaters. Few repeaters create a sound quite like a Patek Philippe minute repeater. On this 5016, the repeater trigger slides up the left side of the watch. Once struck, the chimes in side the watch will sing off each hour, quarter hour and minute of the currently displayed time. 

Philippe Dufour's History 

Philippe Dufour, now 71 years old, decided at fourteen that he was going to be a watchmaker. He trained at Ecole d’Horlogerie de la Vallée de Joux in Switzerland, graduating at 19 years old in 1967. He went on to work for a number of well known Swiss watchmakers, including Jaeger-LeCoultre. He spent the subsequent years perfecting his masterful skills and purchased a workshop in 1978 where he restored antique watches and further honed his now famous techniques. At the 1992 Basel Fair, Dufour presented the first piece under his eponymous brand, a Grande Sonnerie wristwatch. Since then Dufour has produced only two models, the Duality and Simplicity. 

Dufour is The Purist for the purists. Every watch is handmade by the man himself, from start to finish. During an era when watch brands were focused on marketing and increasing margins, Philippe Dufour was focused on crafting the most beautiful pieces he possibly could. 

 Philippe Dufour Market

Because Philippe Dufour creates each watch himself, very few are produced every year. As a result, supply is highly limited and his waitlist for new watches will likely exceed his lifetime. This has created a robust and healthy secondary market for what might be the most sought after independent watch in the world. Few ever hit the market, and when the do, passionate collectors move quickly to try and add one to their hands. 

 Philippe Dufour Simplicity 

This Philippe Dufour Simplicity is in excellent original condition. The watch has been worn, but is free of any major scratches or issues. It also comes complete with the original box and certificate. Please feel free to get in touch with any questions you might have and find additional photos on our listing page here. 

In 1959, Patek Philippe patented the “Time Zone Watch” system which was used in the Travel Time Ref. 2597. This reference is recognizable in the classic ref. 570 case but with a travel time movement and two push buttons on the left side of the case.

The top button advances the hour hand forward, while the bottom button moves it back an hour. These watches are exceptionally rare and perhaps the most elegant travel time watch in history. Find more information on our Patek Philippe Travel Time, Ref. 2597 available here. 

Below are a few highlights of our favorite vintage Rolex pieces currently available on our site. 

 Rolex Yellow Gold Veriflat ref. 6512, Retailed by Tiffany & Co. 

This Rolex "Veriflat" ref. 6512 was originally created in 1954 and remains the slimmest Oyster case Rolex has ever created. Rolex, not known for their slim cases, produced the Veriflat as a beautiful dress watch with the benefits of the water resistant Oyster case. Some of these examples, like the one featured here, were chronometer certified. The Veriflat was produced from 1954 until 1962, a short production run for Rolex, making these references quite rare. 

The Rolex Veriflat ref. 6512 featured here is particularly special because it was originally retailed by Tiffany & Co. and bears the retailers stamp below the Veriflat text. The case also features a few numbers etched in the lug, common in Tiffany Rolex and often believed to be an internal sku number for the retailer. Find our more about this Rolex "Veriflat" ref. 6512 here.

Rolex "Bakelite" GMT-Master ref. 6542 with Original Paperwork

This stunning Rolex GMT-Master, Ref. 6542 is in incredible original condition and comes complete with some fantastic original paperwork. The reference 6542 was the first GMT-Master and nicknamed Pussy Galore after the character from the James Bond film Goldfinger. The watch features a bakelite bezel, no-crown guard case and beautiful gilt dial. This particular example comes with the original guarantee from 1958, original hang tag with serial number, two manuals and Time magazine Watch of the Year promotional magazine. This watch also comes with documentation noting the watch has been tested by Rolex and does not contain any substance in violation of the Atomic Energy Commission regulations. This GMT-Master, ref. 6542 also comes with its original box. This watch has a 39X,XXX serial number. Find out more about this Rolex Bakelite GMT-Master, Ref. 6542 here.

Rolex Date ref. 1501 with Gilt Dial

Vintage, gilt dial Rolex has a special place in many collectors hearts. There is something about the gold and black contrast with a nice, steel case that looks just right. With a rapid climb of pricing in premium vintage Rolex, it is hard to imagine finding a gilt Rolex at an affordable price point. However, this 1960s Date features a beautiful gilt dial and excellent case. Learn more about this Rolex Gilt Dial Date ref. 1501 here.

Rolex "No-Crown Guards" GMT-Master ref. 1675

This yellow gold, 1960 Rolex GMT-Master, ref. 1675 is a gorgeous example of this rare variation of the 1675. The reference 1675 was released in 1959 as an upgrade from the 6542 with the most obvious upgrade being the metal guards on each side of the crown. Some of the yellow gold examples, however, did not feature crown guards, earning them the nickname No Crown Guards or NCG in the vintage Rolex world. These examples are extremely rare and have a fantastic vintage feel to them. This particular yellow gold, No Crown Guard 1675 is in excellent original condition, with a tight rivet bracelet, beautiful brown dial and insert and very nice original lume. Learn more about this yellow gold, Rolex "No-Crown Guards" GMT-Master 1675 here.

Rolex "Chapter Ring" Explorer ref. 1016

This Rolex Explorer, ref. 1016 features a beautiful, original, gilt, chapter ring dial and an excellent case and rivet bracelet. These gilt dials had a tendency to blemish and damage over time, making it rare to find them in such clean condition. This watch has a 31X,XXX serial number and a caseback stamped 1.60. Learn more about this Rolex "Gilt, Chapter Ring" Explorer ref. 1016 here.

Rolex Red Submariner ref. 1680 with Original Papers

This gorgeous Rolex Red Submariner, ref. 1680 features a Mark V dial, the 5th version of the Red Sub dial. A clear indicator of a Mark V is the slightly open 6s in 660 Ft. This Red Sub has a 3.40 million serial number and the caseback is stamped IV.72. The dial is free of flaws, the markers, hands and pearl are all original and matching beautifully. The case is thick and likely never polished with wide, pronounced chamfers. This watch comes with the original Rolex Warranty with punched serial numbers. Learn more about this Rolex "Red" Submariner ref. 1680 here.

For many collectors, the Patek Philippe Perpetual Calendar, Ref. 3940 is one of the finest watches of the 1980s and perhaps the modern era of Patek Philippe. The 3940 is believed to be the preferred watch to a man who could have worn any of the brand’s watches, Philippe Stern, the former CEO and father to current CEO of Patek Philippe. Within a few moments of wearing the 3940 it is easy to understand why. With a stunning brushed silver dial, masterfully balanced subdials and thin, 36mm case, this watch is gorgeous and wears perfectly. The 240-Q is self-winding, micro-rotor powered movement that is particularly thin and can be viewed through the display caseback on some 3940s. 

 The Patek Philippe Perpetual Calendar, ref. 3941

While many Patek Philippe collectors are familiar 3940, fewer know of the 3941. When the 3940 was released in 1985, it featured a solid caseback as had nearly every Patek Philippe watch before it; However, at the same time, a very low number of 3941s were released with clear casebacks, making them among the first Patek Philippe watches with display casebacks. In response to demand for both casebacks, Patek began offering the 3940 with both solid and clear casebacks and discontinued the 3941 in 1990. As a result of the low and short production run of the 3941, as few as 35 examples are known of today.

While the clear casebacks on the Perpetual Calendar 3940s feature a case number engraving, the 3941 caseback bears no marks. Instead, the serial number is engraved on the inside of the case, just under the bezel. 

The Patek Philippe Perpetual Calendar, Ref. 3941 featured in this article is an exceptionally rare opportunity to own one of these magnificent watches. Please find more information on the listing page here.

It is always exciting when leading brands from diverse fields partner to create something special. This holds true in the partnership between contemporary watchmaker F.P. Journe and Holland & Holland, one of the worlds finest gunmakers which has been operating for over 180 years. In late 2017, F.P. Journe announced the partnership in creating a highly limited series of Chronométre watches adorned with very special dials created from the barrels of two antique Holland & Holland guns. 

The Dial of the F.P. Journe Holland & Holland Chronométre

The two antique guns used to produce the dials were made in 1868 (Barrel No. 1382, used in 38 dials) and 1882 (Barrel No. 7183, used in 28 dials). Each barrel was made from Damascus steel, a blend of steel materials used in weapons since the 3rd century. The blending of two or more types of steel made not only for a strong weapon, but also a very beautiful material. This combination of beauty and strength made this material ideal for a watch dial. To create these dials, the barrels were cut open at the Holland & Holland factory and rolled out to create flat strips, which were then cleaned, polished and made thinner. Each strip was then sent to F.P. Journe’s dial maker, Les Cadraniers de Genéve, where they were cut in to dials. The dials then went back to Holland & Holland to be treated with a technique called “browning,” which brought out the gorgeous patter and protected the steel. 

The Movement

The movement in the F.P. Journe Chronométre Holland & Holland is made from 18k rose gold and includes the Holland & Holland engraving. The caliber 1304 movement features a free-sprung balance and 56 power reserve. These 39mm watches were produced in a limited number of 66 total watches. Our available F.P. Journe Chronométre Holland & Holland here.