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Results for Marine Chronometer & The Longitude Problem

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Rolf Lang Combines Lalique Crystal and a Hand-Made Tourbillon in a Table Clock SJX Watches
Feb 27, 2022

Rolf Lang Combines Lalique Crystal and a Hand-Made Tourbillon in a Table Clock

German independent watchmaker Rolf Lang produces both wristwatches and clocks – including a lavish gold egg containing a marine chronometer – and he now turns to French glassmaker Lalique for his latest sculptural clock. Their collaboration resulted in the Phoenix Clock that is entirely hand engraved and equipped with a gigantic tourbillon – held aloft by a glass-crystal sculpture of a soaring eagle with wings spread. Rolf Lang Initial thoughts Like the ultra-luxe egg clock of 2018, the Phoenix is appealing for its strong design and craftsmanship. The father of independent watchmaker Marco Lang, Rolf Lang’s house style is highly decorative and rooted in 19th century watchmaking so the aesthetic means the clock is not for everyone, but it is certainly impressive for those who appreciate what it is. With its ornate decoration, the Phoenix evokes the elaborate clocks and watches made for the Chinese market in the 19th century. It has an old-fashioned style and quality that stands in contrast with most contemporary watchmaking. And the clock excels at what it does, which is to impress while sitting on a desk. Still, it manages to be different and slightly modern as a result of the to the clever use of high-contrast materials. The crystal sculpture is splendid, and the clock itself is even more attractive with the ultra-large tourbillon sitting in full view under a glass sphere. While it has a big price tag, the Phoenix is special; there are nothing quite like it ...

Bring a Loupe: A Lucien Piccard Telephone, A Mappin and Webb Dress Watch, An Omega Admiralty, And A Jaeger LeCoultre Master Mariner Hodinkee
Audemars Piguet perpetual calendar Oct 2, 2026

Bring a Loupe: A Lucien Piccard Telephone, A Mappin and Webb Dress Watch, An Omega Admiralty, And A Jaeger LeCoultre Master Mariner

Friday's upon us again. Happy pumpkin spice season to all who celebrate. While you're deciding whether to see Digger in the theater, planning your elaborate Halloween costume, penciling in time to watch the WNBA finals and MLB playoffs, and tracking fallout from the Man City scandal, here are a few watches to tide you over as the mercury drops. Scorekeeping last week's picks, the ZRC went for €6,000, the Omega Ranchero for €3,500, the Cartier Santos sells tomorrow, and the Audemars Piguet perpetual calendar for $14,000. Strays Here's an honest-looking early Heuer 844, which, yes, has a worn crystal and bezel, and it 'requires attention' according to the listing. That said, it's got a decent-looking Monnin case, cathedral hands (meaning Mk 1), and a movement that's common enough to be fairly easily resurrected. For those who at some point fell into the Omega Symbol watch rabbit hole, here's a pair of excellent men's versions—this one and that one—and an accompanying pair of women's versions (this and that), and if all of that is gobbledygook to you, count yourself lucky and move along. If you've been hankering for a great-looking 1979 Rolex Milgauss ref. 1019, your time has come. Photo courtesy of The Saleroom. This is in the running as the prettiest school pocket watch I've seen in a long time, and a good argument for why people should continue investing more time, energy, and money into pocket watches. Bonhams' upcoming New York auction on the 8th has plenty of wo...

Remembering Jean-Marie Schaller, One Of Watchmaking’s Brightest Characters Fratello
Louis Moinet May 19, 2026

Remembering Jean-Marie Schaller, One Of Watchmaking’s Brightest Characters

We were deeply saddened to hear of the passing of Jean-Marie Schaller, the owner and creative force behind Louis Moinet. Jean-Marie passed away peacefully on May 16th at the age of 66. I wanted to share a few personal words about Jean-Marie because he was someone I came to know not only through watches but […] Visit Remembering Jean-Marie Schaller, One Of Watchmaking’s Brightest Characters to read the full article.

Elegance Meets Accuracy - Going Forward, All Of Serica’s Watches Will Be COSC-Certified Chronometers Fratello
Serica s Watches Will Be Feb 1, 2024

Elegance Meets Accuracy - Going Forward, All Of Serica’s Watches Will Be COSC-Certified Chronometers

Any young watch brand constantly has to make choices about designs, costs, quality, and many other aspects that affect the organization every day. In the case of Serica, a young Parisian brand founded in 2019, elegance, reliability, and accuracy steer the decision-making process. In terms of elegance, I don’t think there was anyone who thought […] Visit Elegance Meets Accuracy - Going Forward, All Of Serica’s Watches Will Be COSC-Certified Chronometers to read the full article.

Interview: Marie-Laure Cérède, Cartier’s Watch Design Chief SJX Watches
Cartier s Watch Design Chief Oct 1, 2021

Interview: Marie-Laure Cérède, Cartier’s Watch Design Chief

Cartier has enjoyed industry-beating growth since current chief executive Cyrille Vigneron took over in 2016, with demand for both its watches and jewellery rising at a steady clip. One of the individuals behind the success of Cartier’s watch division is Marie-Laure Cérède. Having started her career at Cartier, she spent a dozen years at Harry Winston, before returning to the French jeweller in October 2016 as the Deputy Creative Director of Watchmaking. And in May 2017 she was elevated to the top job in design, making her ultimately responsible for the aesthetic of Cartier’s watchmaking. One of the first redesigns during Ms Cerede’s leadership was the Santos, which has evolved from the Santos launched in 1978 (far left), to the Santos 100 of the 2000s (centre), and finally the present model Her tenure has been marked by a steady stream of hits, ranging from collector favourites like the Tank Cintree to the trendy Tank Must. In that time, Cartier has reimagined most of its trademark watch lines, including the Santos and more recently, the Pasha. I spoke with Ms Cérède earlier this year to uncover the secret behind her successful rejuvenation of Cartier’s diverse line-up. Also present during the interview was Anne Charrier, the public relations-strategy manager for jewellery, watches, and accessories. The interview was edited for clarity and length. SJX: Cartier has a strong collection this year, both for men and women. And for a few years now, you have had stro...

Why I Bought My Vacheron Constantin Patrimony Manual-Winding Fratello
Vacheron Constantin Patrimony Manual-Winding You may Oct 28, 2026

Why I Bought My Vacheron Constantin Patrimony Manual-Winding

You may congratulate me on finally becoming an adult. I always thought things like getting married and buying a house were signs of adulthood. I was wrong. You’re only really a grown-up if you own a dress watch. The problem was that my mind and taste hadn’t matured enough to look for one. Once I […] Visit Why I Bought My Vacheron Constantin Patrimony Manual-Winding to read the full article.

Introducing - Ochs und Junior Releases its Perpetual Calendar Holiday Edition 2026 Monochrome
Ulysse Nardin […] Oct 22, 2026

Introducing - Ochs und Junior Releases its Perpetual Calendar Holiday Edition 2026

Most high-end perpetual calendars are fragile creatures composed of hundreds of components, delicate levers and springs. The problem with many is that they are susceptible to damage, especially if the crown or pushers are manipulated during the watch’s date-change cycle. Master watchmaker Ludwig Oechslin tackled the problem with the Perpetual Ludwig, developed for Ulysse Nardin […]

Introducing - Oris Aquis Date Kelp Forest Limited Edition Monochrome
Oris Aquis Date Kelp Forest Oct 20, 2026

Introducing - Oris Aquis Date Kelp Forest Limited Edition

Oris supports environmental causes through its watches, like the Aquis Date Yangtze Jiangtun or the New York Harbour limited editions, participating in projects dedicated to protecting marine ecosystems and bringing attention to issues beyond watchmaking. The new Aquis Date Kelp Forest Limited Edition is made with Francis Pérez, the award-winning underwater photographer and long-time Oris […]

How To Juggle Vintage Inspiration And Modern Reinterpretation Fratello
Oct 4, 2026

How To Juggle Vintage Inspiration And Modern Reinterpretation

Recently, I’ve experienced several watches that all wrestle with the same problem in different ways. Vario, Timor, and Ollech & Wajs each draw heavily on history, yet each brand has landed on a different answer to a question that sounds simple and is not: how much of a vintage design should a modern watch actually […] Visit How To Juggle Vintage Inspiration And Modern Reinterpretation to read the full article.

Introducing: Article Prep Hodinkee
Jul 29, 2026

Introducing: Article Prep

What We Know TK What We Think Something someone said someone. TK The Basics Brand: Model: Reference Number: Diameter: Thickness: Case Material: Dial Color: Indexes: Lume: Water Resistance: Strap/Bracelet: The Movement Caliber: Functions: Diameter: Thickness: Power Reserve: Winding: Frequency: Jewels: Chronometer Certified: Additional Details: Pricing & Availability Price: Availability: Limited Edition: For more, click here.

Watches & Wonders: Bulgari Launches an Octo Finissimo in 37mm Worn & Wound
Bulgari Launches Apr 13, 2026

Watches & Wonders: Bulgari Launches an Octo Finissimo in 37mm

The Bulgari Octo Finissimo is a certifiably unique watch that you can identify on someone’s wrist from across a room. Part of this is because of its exotic integrated design, and the other part is that they are kind of huge, despite being very thin. That contrast has always been part of the appeal, but also part of the problem. For years, the Octo Finissimo has represented an avant-garde take on modern watch design. Thin, minimal, architectural, and kind of brutal, it exists as a distant relative of a Genta-era idea, but pushed into something more experimental. It has also built its reputation on technical achievement, frequently contending for the world’s thinnest watch, and holding that title more than once over the last decade. But this year, Bulgari isn’t focused on thinness. Instead, they’ve turned their attention to something far more practical: wearability. For the first time since the line launched in 2014, Bulgari has introduced a smaller “consumer” model, bringing the Octo Finissimo down to 37mm. On paper, that might not sound like much. In practice, it changes everything. The standard 40mm models were always a bit deceptive. While 40mm is not particularly large for a round watch, the Octo Finissimo is anything but round. These watches are essentially flat squares with wide integrated lugs, creating a large corner-to-corner span and a cuff-like presence on the wrist. The result is a watch that wears significantly larger than its width suggests. It’s...

In Depth: Laboratoire de Précision SJX Watches
Omega Constellation Observatory we were Apr 9, 2026

In Depth: Laboratoire de Précision

Alongside the launch of the Omega Constellation Observatory, we were among the first members of the public granted access to the Swatch Group’s Laboratoire de Précision (LP), a new independent chronometer testing institute with facilities in Omega’s native Biel/Bienne and Villeret. The new organisation does not redefine chronometer norms, but it has developed a new acoustic certification process that is more automated and provides client brands with a richer performance data set - a unique capability that has implications beyond mere certification. Laboratoire de Précision. Image – Omega Initial thoughts The debut of the Constellation Observatory, the first watch certified by LP and the first-ever two-handed Master Chronometer, was greeted with a mixed feedback from both collectors and the press. Some found the choice to launch a chronometer without a seconds hand heretical, viewing it as a gimmick to promote LP’s new testing process. The Omega Constellation Observatory is the first watch to complete chronometer certification at LP. Regardless of how one feels about the two-handed aspect of the watch - I found the design balanced and appealing, even if the concept is a bit quirky - the launch placed a renewed focus on the way official chronometers are tested and certified. Many were confused by the claimed novelty of acoustic testing, given the universal presence of Witschi machines on watchmakers’ benches. Indeed, the method is not new. What is new is t...

Hands On: Omega Constellation Observatory SJX Watches
Omega Constellation Observatory Mar 30, 2026

Hands On: Omega Constellation Observatory

At long last, Omega has unveiled the spiritual successor to the beloved ‘Pie Pan’ Constellation, complete with its signature domed dial, observatory medallion, and ‘dog leg’ lugs, the Constellation Observatory. First teased on the wrist of actor Delroy Lindo at the Academy Awards, the Observatory debuts in an expansive range of case materials and dial treatments. The collection also marks the commercial debut of Swatch Group’s Laboratoire de Précision, which has developed a new chronometer testing process capable of certifying two-handed watches. As a result, the Observatory carries the unexpected distinction of being the first Master Chronometer that displays only the hours and minutes. The Observatory in 18k Sedna gold, the brand’s trade name for its proprietary rose gold alloy. Initial thoughts The Observatory embodies Omega’s strengths, capitalising on the brand’s historical pedigree and proprietary materials and technologies, including its own durable alloys and the co-axial escapement. The Observatory in steel. On the other hand, the Observatory suffers somewhat on account of its thickness, relying on a movement platform developed at a time when the trend toward large watches appeared to have no end in sight. That said, the case design does a decent job of reducing the perceived thickness, and it looks and feels thinner than many other watches that share its dimensions on paper. It also demonstrates the immense capabilities of the broader Swatch Grou...

COSC Upgrades Standards to Certify More Than Timekeeping SJX Watches
Rolex Feb 13, 2026

COSC Upgrades Standards to Certify More Than Timekeeping

Interesting news just out of Contrôle Officiel Suisse des Chronomètres (COSC), the venerable Swiss chronometer testing body, which has just announced a major revamp to its testing to honour the COSC’s standard’s 50th anniversary. Excellence Chronometer, COSC’s new and improved certification program, goes beyond the ISO 3159 norm that has defined its tests for decades. Instead of just testing movements, Excellence Chronometer will require completed, cased watches to run within -2/+4 seconds a day, as well as pass wear simulation and magnetism tests. Initial thoughts While COSC remains the primary chronometer testing body in Switzerland, thanks largely to Rolex, its protocols have been due for an update for some time now. With the rise of alternative and in-house precision testing programs, the standard chronometer certification can sometimes feel left behind. Rolex’s own Superlative Chronometer certification first requires a COSC certificate, but then makes sure the watches run at -2/+2 seconds per day after further in-house testing. The METAS Chronometer program also requires the standard COSC certificate, but guarantees a regulation of 0/+5 seconds per day and a great resistance to magnetic fields. Seeing that COSC slowly updates and imposes more stringent criteria is a good sign, but it may still not be good enough. With the rise of advanced internal certification programs, it looks like some brands submit their models to COSC testing just to make sure they can...

Complicated Collectors: Seth Atwood SJX Watches
Patek Philippe ref 871 made Jan 5, 2026

Complicated Collectors: Seth Atwood

In the late 1970s, anyone serious about horology would eventually find themselves in Rockford, Illinois, about 90 miles west of Chicago. Visitors stayed in a hotel near a motorway that happened to be home to many of the world’s greatest clocks and watches. The collection of Seth Atwood sat below the everyday hum: Roman sundials beside Islamic astrolabes; marine chronometers alongside French regulators; English pocket watches paired with American factory movements; and, at the far end, atomic clocks. Rockford was a town that built machine tools and industrial equipment, so the hotel naturally served business travellers and convention attendees. But among them were watchmakers who flew in from Europe and Asia to see mechanisms they couldn’t examine anywhere else. For nearly three decades, one man’s vision put Rockford on the horological map. The 1972 secular true perpetual calendar Patek Philippe ref. 871, made for Seth G. Atwood. Image – Christies/collage Rockford native Seth Glanville Atwood was born in 1917, into a world of industrial logic. His father had started the Atwood Vacuum Machine Company a year earlier, its first product a simple spring-loaded bumper that kept car doors from rattling. Detroit needed millions of them, and the company grew from there, supplying window regulators, door hardware, and other practical parts in volume. Seth grew up around engineers and production managers who solved problems with their hands. After Stanford, Harvard Business Sc...

Hands On: Chopard L.U.C. Grand Strike SJX Watches
Chopard L.U.C Grand Strike Dec 11, 2025

Hands On: Chopard L.U.C. Grand Strike

The 30th anniversary of the Chopard L.U.C. manufacture was one anniversary among many this year, but it will likely be remembered thanks to the Grand Strike, the most complicated watch in Chopard’s history and its first grande sonnerie. Building on the successful Full Strike minute repeater architecture and making full use of the brand’s patented sapphire gongs, the Grand Strike is a chronometer-certified two-train clock watch with a push-button minute repeater. In this context, the presence of the tourbillon is almost a footnote. Initial thoughts I can count on one hand the number of brands that have created their own grande sonnerie wristwatch. It’s one of the few things in watchmaking that’s proven challenging enough to still be rare, even in the days of computer-aided design (CAD) and advanced manufacturing technology like wire erosion. For this reason, the grande sonnerie has a towering cultural presence among watchmakers and collectors, looming above all other complications. For Chopard, the Grand Strike represents the culmination of 30 years of the L.U.C. manufacture, the brand’s haute horlogerie division. The first impression of the Grand Strike is one of extraordinary depth. There’s not much of a dial, save for the minutes scale etched on the inside of the sapphire crystal, and the small concentric sub-dials for the dual power reserve displays. This depth shrinks the watch visually, and it feels dense and compact despite its rather large 43 mm size and...

In-Depth: Breguet’s Constant-Force Magnetic Escapement SJX Watches
Breguet s Constant-Force Magnetic Escapement Dec 4, 2025

In-Depth: Breguet’s Constant-Force Magnetic Escapement

Earlier this week, Breguet rounded off its grandiose 250th anniversary with the unexpected launch of the Expérimentale 1 chronometer in Paris. Showcasing modern Breguet’s most impressive innovation to date - a magnetic constant-force escapement - the watch left many scratching their heads simply because the novel invention defies easy explanation. Here we explain the actual functioning of this remarkable invention, and why it represents such a significant step forward in terms of chronometry and escapement technology. The origins of the concept Before turning to the decidedly modern and futuristic Expérimentale 1, we must first take a short trip to the past and consider how the idea of using magnets in mechanical escapements first came to life. For that we must turn to the late 1930s, when Cecil Frank Clifford, Fellow of the British Horological Institute (BHI), started experimenting with oscillators maintained by magnetic rails or escape wheels.  He was granted a British patent in 1954 for a variety of magnetised escape wheels paired with elastic vibrating magnetic blades. The device would operate silently and Clifford envisioned it being used for naval underwater torpedoes, so the lack of ticking would be harder to pick up by sonars.  Iterations of Clifford magnetic escapements. His designs were rudimentary. The principle was that the escape wheel would be braked by a vibrating pair of magnetised blades (in several possible configurations), while simultaneously ...