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Results for Marine Chronometer & The Longitude Problem

43,116 articles · 251 videos found · page 38 of 1446

First Look - The Double-Signed Zenith G.F.J. Calibre 135 with Naoya Hida & Co. Monochrome
Zenith G.F.J Calibre 135 Jun 2, 2026

First Look - The Double-Signed Zenith G.F.J. Calibre 135 with Naoya Hida & Co.

When Zenith, celebrating its 160th Anniversary, revived the Calibre 135 in 2025 with the launch of the G.F.J. collection, the manufacture brought back one of the most important precision movements, a calibre that dominated observatory chronometry competitions throughout the 1950s and remains the most awarded movement of its kind. Taking the story in an unexpected […]

Hands-On: The Quietly Launched Jaeger-LeCoultre Reverso Tribute Monoface “Or Deco Cocktail” Hodinkee
Jaeger-LeCoultre Reverso Tribute Monoface “Or May 13, 2026

Hands-On: The Quietly Launched Jaeger-LeCoultre Reverso Tribute Monoface “Or Deco Cocktail”

Last year's launch of a new Reverso Tribute Monoface "Or Deco" in pink gold (with a gorgeous Milanese mesh bracelet) was probably the most outstanding release from Jaeger-LeCoultre in a while. Its time in the sun was somewhat brief, though, as it was a bit upstaged this year by the new Master Control Chronometre line (for which a Hands-On is forthcoming soon, I promise). Yet, at Watches and Wonders last month, the brand showed it could do more with the "Or Deco" platform, introducing three new Reverso Tribute Monoface Small Seconds "Or Deco Cocktail" watches, including two in a new material. Last year's release is still a stunner. You may have missed these new watches. That's in part because the brand is set to make a more complete announcement in a few weeks, with an immersive pop-up of its "Reverso Stories" series from May 21 to May 31 in the Miami Design District, ahead of the opening of a new boutique there this summer. The idea is to focus on rare pieces, including historic high-jewelry models, and to premiere some new Reverso pieces that play into that concept, including this trio. However, before the watches were shipped to South Beach, we got to see them in New York and get to spill the tea, as the kids say, before their Miami feature debut.  The standouts, at least in terms of novelty, are the two new white-gold versions. The framework remains the same, a 45.6 x 27.4 x 7.56mm case, now in white gold, housing a manually wound Jaeger-LeCoultre caliber 822 movement....

Our Favorite Complicated Watches From Watches & Wonders 2026 Teddy Baldassarre
Jaeger-LeCoultre Master Control Chronometre Perpetual Apr 23, 2026

Our Favorite Complicated Watches From Watches & Wonders 2026

Our editors might still be reorienting themselves to their local timezone after being on Geneva time the past week, but the challenges of Watches & Wonders Editors' Picks must continue while the show is fresh in their minds. For this edition, we tasked our editors with selecting the watch complication that has stuck with them most from this year's lineup. From the sophisticated to the decidedly playful, down below, you'll find the watch complications that have risen above the pack, as decided by our editorial team. Explore our full editorial coverage of this year's show here.  D.C. Hannay: Jaeger-LeCoultre Master Control Chronometre Perpetual Calendar Another luxury watch pick, another slam dunk for Jaeger-LeCoultre. Whichever way the wind is blowing in the Vallée de Joux, it’s been doing wonders for JLC of late, exemplified by the new Master Control Chronometre series. The brand has finally gone and made a modern, real-deal integrated luxury model, and enthusiasts are pricking up their ears. Along with the sleek Chronometre Date and the symmetrically gifted Chronometre Date Power Reserve, they’ve come up with a truly breathtaking riff on one of the most complicated complications, the Chronometre Perpetual Calendar. Absent of the hype surrounding the Royal Oak or the Nautilus, we’re presented with a beautifully balanced dial and cohesive design, packaged in a startlingly svelte 39mm case just 9.2mm thin. Also available in a glowing pink gold with a complementary br...

Watches & Wonders: Jaeger-LeCoultre Reintroduces the Master Control Collection and their “HPG” Designation Worn & Wound
Jaeger-LeCoultre Reintroduces Apr 20, 2026

Watches & Wonders: Jaeger-LeCoultre Reintroduces the Master Control Collection and their “HPG” Designation

In addition to a barrage of ultra high end novelties, Jaeger-LeCoultre this week has introduced the new Master Control Chronometre collection, with a focus on chronometric elegance with watches featuring a sleek new integrated bracelet sports watch design. Jaeger-LeCoultre has a long history, of course, of not just pure movement making and horology, but in providing certainty behind their movements through the Master Control collection, which was a testing certification conducted in-house over 1,000 hours. The Master Control Chronometre collection continues that tradition while also filling a gap in the brand’s catalog: a (relatively) accessible everyday watch that is not a Reverso.  Before getting into the watches themselves, we’ll start with an overview of what “Master Control” really means in 2026. This collection reintroduces the brand’s “High Precision Guarantee” designation, which is an update of an old standard first used on JLC’s Calibre 916, their renowned 4 Hz caliber introduced in 1970. The new HPG designation evaluates performance across four metrics: altitude (certifying that the watch can withstand pressure up to 1004 meters above sea level, the altitude of the JLC manufacture), multi-directional shocks, testing in multiple positions, and variances across temperature. Jaeger-LeCoultre has developed new machinery to test for these conditions, which the brand says can simulate real world use over a long duration in just three days of actual tes...

Live from WWG26: the new release from Ferdinand Berthoud Deployant
Ferdinand Berthoud Apr 16, 2026

Live from WWG26: the new release from Ferdinand Berthoud

DEPLOYANT - The watch magazine for collectors, by collectors Ferdinand Berthoud flipped their movement released 10 years ago in the FB 1. The new watch is Chapter 1 Chronomètre FB 2TV is like an inverted version of the FB 1. But of course, as this is a Ferdinand Berthoud, the entire movement is reworked to flip over, and the entire movement is now visible [...] The post Live from WWG26: the new release from Ferdinand Berthoud appeared first on DEPLOYANT.

Introducing: The New Panerai Luminor Collection Fratello
Panerai Luminor Collection Last year Apr 13, 2026

Introducing: The New Panerai Luminor Collection

Last year, Panerai refreshed its Luminor Marina collection and introduced slimmer cases with increased water resistance ratings. This year, the brand is playing directly to my wheelhouse by updating its Luminor collection. For reference, these watches include manual-winding movements, which I love to see and use. We were fortunate to have these pieces in our […] Visit Introducing: The New Panerai Luminor Collection to read the full article.

Introducing - The Panerai Radiomir Viaggio Nel Tempo Experience Set Monochrome
Panerai Radiomir Viaggio Nel Tempo Feb 24, 2026

Introducing - The Panerai Radiomir Viaggio Nel Tempo Experience Set

When presenting a watch, we often talk about the wearing experience. Yet Panerai chose to expand the experience angle, and over the past few years, it has been transforming ownership into participation through its special program of curated journeys that put collectors inside the brand’s storytelling. The Submersible Chrono Marina Militare PAM01699, Radiomir 8 Giorni […]

In-Depth - The Superb Breguet Classique 7225, and the Refinement of the Magnetic Pivot Monochrome
Breguet Classique 7225 Nov 26, 2025

In-Depth - The Superb Breguet Classique 7225, and the Refinement of the Magnetic Pivot

Until recently, for those who have followed Breguet‘s exploits in modern chronometry, one watch has long occupied a special place: the Classique Chronométrie 7727, from 2013. The 7727 demonstrated what high frequency could achieve when combined with silicon components and, quite provocatively, when magnetism, a force that watchmaking usually fears, was not only controlled but […]

Introducing: The Three-Watch-Strong Lebois & Co Heritage Small Seconds Collection Fratello
Oct 30, 2025

Introducing: The Three-Watch-Strong Lebois & Co Heritage Small Seconds Collection

After a series of chronographs, the Dutch-based brand Lebois & Co returns with a trio of three-handers. Please welcome the Heritage Small Seconds collection. The silver Script, blue Baton, and black Numeral Founder’s Launch editions are COSC-certified chronometers with perks for early adopters. A “Chronomètre Lebois & Co” sweater inspired by Parisian streetwear is waiting […] Visit Introducing: The Three-Watch-Strong Lebois & Co Heritage Small Seconds Collection to read the full article.

Behind the DIN 8330 Standard for Pilot’s Watches Worn & Wound
Sinn lead Oct 3, 2025

Behind the DIN 8330 Standard for Pilot’s Watches

Standards and certifications in watchmaking were primarily developed for chronometry, as well as to reassure the buyer that their watch had been thoroughly tested to a certain level of accuracy. The standards we see most often in the technical specifications are COSC, METAS, and other company or regional chronometry certifications. In modern watchmaking, other key standards like the ISO 6425 dive watch standard, which was developed in the 1990s and followed by watch companies, also come into play. These standards were largely based on various military set standards for watches; however, since each military set their own requirements, there was not one universally followed standard. The International Organization for Standardization (ISO) published specific requirements and testing procedures for a watch to be officially designated a “Diver’s watch”. While there is no ISO standard for pilot’s watches, there are specific requirements set by militaries around the world. One of the most well-known standards is from the WWII German pilot’s watch known as the “Beobachtungsuhren” or “B-Uhren.” B-Uhren pilot’s watch standards are well documented and are still followed by many watch companies to this day. In March 2012, Sinn lead an initiative in collaboration with the Faculty of Aerospace Technology at the Aachen University of Applied Sciences to create TESTAF – Technical Standard for Pilot Watches. TESTAF was developed so that a pilot’s watch meets all mod...

First Look - The New H. Moser & Cie. Streamliner Tourbillon Pierre Gasly (Incl. Video) Monochrome
H. Moser & Cie Streamliner Tourbillon Oct 1, 2025

First Look - The New H. Moser & Cie. Streamliner Tourbillon Pierre Gasly (Incl. Video)

On the eve of the 2025 Singapore Grand Prix at the Marina Bay Street Circuit, H. Moser & Cie. pulls the covers off its latest Formula 1-themed watch. But it’s perhaps not what you expect, as it doesn’t come in some highly exotic F1-tech derived material, nor with a revolutionary design. Instead, the renowned independent […]

Hands On: Panerai Revives the Luminor 5218 SJX Watches
F.P. Journe Resonance Sep 12, 2025

Hands On: Panerai Revives the Luminor 5218

There were few brands as hot as Panerai in the 2000s, and now the brand is revisiting its glory days with the Luminor Marina Militare 44 mm PAM05218. Visually, the PAM05218 a faithful remake of the Luminor ref. 5218-202/A of 1993, a “Pre-Vendome” model that became one of the most desirable watches of the 2000s. The watch retains the same design and many of the details, including the “non matching” hands, but has been upgraded with modern amenities, including a diamond-like carbon (DLC) coating for the case and a three-day movement. Initial thoughts Enthusiasts who were in the hobby in the 2000s will remember the frenzy around Panerai, which was probably the fastest growing brand during the period. Many models sold over retail, sometimes for multiples. The “vintage” models like the Luminor ref. 5218-202/A were even more valuable; it cost a healthy, mid-five figures at the time. In fact, the ref. 5218-202/A cost more than an F.P. Journe Resonance at the time. In retrospect, most of it was comical yet also seems familiar given the happenings in recent years. Times have changed, but the PAM05218 is essentially unchanged from the original – which is great for those who appreciate the functional, stark design of Panerai’s core models. I like those designs, and I like the PAM05218. If there’s one Panerai in the current catalogue I would buy, it is this one. At a distance, the PAM05218 is indistinguishable from the original, but up close it is clearly a new watc...

Hands-On: the Apiar Gen1.0 Worn & Wound
Aug 15, 2025

Hands-On: the Apiar Gen1.0

The British brand Apiar has an intriguing slogan emblazoned across the front page of their website: Impossible Watches. Made Possible. If you spend enough time thinking about watches, collecting watches, and learning about watches, you begin to realize their limitations. Whether they’re chronometry related or have to do with the design and build of the watch itself, there are certain things that just can’t be done, or else stretch the limits of our current technology to the point where those things aren’t remotely feasible. The crazy idea you had for a watch case that defies the laws of physics might be something that only exists on paper.  Additive manufacturing and 3D printing technologies have the potential to change that. When a metal object is formed by adding material to it rather than stripping it away, a manufacturer can create shapes, textures, and structures that would be impossible otherwise. Apiar’s Gen1.0 is a thrilling example of the possibilities of 3D printing in watch manufacturing. They’re by no means the first to create watches this way, of course, but they’re part of a new class of brands using the technology in an experimental way that seems to finally make the most of it, creating not just beautiful objects that defy watchmaking convention, but watches that redefine our expectations around durability, lightness, and other metrics by which all of us evaluate these things. Importantly, the use of additive manufacturing also democratizes wat...

W Worn & Wound
Worn & Wound
Fortis May 29, 2025

All the Panels of the Windup Watch Fair San Francisco 2025 and More!

The 2025 Windup Watch Fair in San Francisco was one for the books. Thousands of attendees poured into the city’s vibrant Marina District for three days of hands-on horology, exclusive releases, and face time with the creators behind the brands we love. The energy was electric, and the programming only elevated what was already an unforgettable experience. Thanks to our sponsors, this year’s event reached new heights, with panels that brought depth, insight, and real-time connection to the forefront. Here are recordings of the full conversations that helped shape the weekend, plus some videos from our friends at Fortis and Bulova. Introducing the New Fortis Fliegers with the WERK 7 Manufacture Calibre The Fortis Flieger collection connects over 40 years of aviation heritage with the modern era. Redefined in collaboration with the Swiss Air Force, it stands as the most readable tool watch Fortis has ever crafted. This video goes into its new WERK 7 manufacture calibre with 70 hours of power reserve, as explained by Andreas Bentele, Marketing Manager at Fortis. Panel 1 – Making Watches for the Enthusiast vs. the Curious Worn & Wound’s Managing Editor Zach Kazan kicked off the programming with a lively conversation featuring Abingdon Mullin, CEO at Abingdon, Jonathan Ferrer, Designer & Founder at Brew, and Brandon Little, Founder & Designer at Artefkt. The panel explored how brands can speak to both hardcore collectors and casual newcomers-without diluting their voic...

Hands-on - The Ball Roadmaster M Model A, Built to Impress Day and Night Monochrome
Apr 29, 2025

Hands-on - The Ball Roadmaster M Model A, Built to Impress Day and Night

In 1891, following a devastating train accident caused by a faulty watch, Cleveland watchmaker Webb C. Ball was called upon to investigate and ultimately standardise timekeeping across America’s growing railroad network. Many think his work laid the foundation for modern chronometry standards. Webb C. Ball, through Ball Time Service, initially certified watches from American brands […]

Obituary: René Beyer, Owner of the World’s Oldest Watch Store SJX Watches
Patek Philippe Apr 16, 2025

Obituary: René Beyer, Owner of the World’s Oldest Watch Store

René Beyer, the eighth-generation owner of Beyer Chronometrie in Zurich, died suddenly on April 13, 2025, at the age of 61​. Beyer was a towering figure in Swiss watchmaking circles, known not only for helming his family’s 260-year-old business, but also for his passionate stewardship of its famed clock and watch museum, his warm ties with independent watchmakers, and his family’s close relationship with Patek Philippe. He is survived by his wife. Beyer’s passing was first reported by Zurich newspaper Inside Paradeplatz. Born in 1963 into the Beyer dynasty that began in Germany in 1760, Beyer grew up surrounded by clocks and watches. Like his father, Theodor “Teddy” René Beyer, he qualified as a watchmaker himself​, learning the business from the ground up. Beyer’s role in the family business started in 1986 when his father suffered a heart attack and was forced to step back. A decade later, Beyer had formally taken over as managing director and proprietor of Beyer Chronometrie, becoming the eighth generation to run the venerable retailer​, which first opened in Zurich in 1822. Unlike many of its peers that expanded nationally and internationally, the business remained a local operation in Zurich. Like many watch retailers of the old-school, Beyer was synonymous with his store. The store on Bahnhofstrasse, the main shopping street of Zurich A retailer and curator During his nearly three decades at the helm, Beyer carried on his father’s legacy and bol...

Hands-on - The All-New Omega Seamaster Planet Ocean Worldtimer Collection Monochrome
Omega Seamaster Planet Ocean Worldtimer Mar 12, 2025

Hands-on - The All-New Omega Seamaster Planet Ocean Worldtimer Collection

Slightly overlooked and possibly in the shadows of the classic Seamaster Diver 300M, the Planet Ocean is the most capable collection of dive watches in Omega’s range, comprising models from 600m up to 6000m water-resistance (without counting the all-mighty Ultra-Deep that survived the Mariana Trench). Born in 2005, it will be celebrating its 20th anniversary […]

H. Moser & Cie. Introduces the Pioneer Tourbillon Burgundy SJX Watches
H. Moser & Cie Introduces Feb 4, 2025

H. Moser & Cie. Introduces the Pioneer Tourbillon Burgundy

A refined addition to H. Moser & Cie.’s line of sporty dress watches, the Pioneer Tourbillon Burgundy is distinguished by a more compact 40 mm case. The look is classic Moser with the signature fumé dial adorned with an imperceptible logo in transparent print. More prominent is the flying tourbillon at six o’clock with the trademark Moser carriage of a wide “V” containing double hairsprings for superior chronometry. Initial thoughts The Streamliner remains the most recognisable model in Moser’s lineup, even as the popularity of integrated bracelet sports watches wanes. Meanwhile, the Pioneer is often overlooked by collectors, making it somewhat underrated despite its appeal. Personally, I like the Pioneer for its sporty design, even though it isn’t a traditional sports watch and instead a cross between a sports and dress watch. Departing from its predecessor’s substantial 42.8 mm case, the new model is more wearable. It leans more towards the dress watch side of the spectrum with its smaller case, but still has a 120 m water resistance (and is delivered with a green rubber strap). Priced at CHF59,900, the Pioneer Tourbillon Burgundy is a value proposition in terms of tourbillons from an independent watchmaker. A steel version would be sportier and more affordable, and while that’s not on the cards yet, it is probably on the way given Moser’s track record. Burgundy gradient A standout feature is the fumé dial that’s made up of black and burgundy treat...

Peter Speake is Back with PS Horology and the New Tsuba Blue and Tsuba Dong Son Worn & Wound
Jan 15, 2025

Peter Speake is Back with PS Horology and the New Tsuba Blue and Tsuba Dong Son

Last week, Peter Speake returned to the independent watchmaking scene when he unveiled the first pieces from his new brand, PS Horology. Peter is something of a legendary figure in the indie watchmaking world. He is the co-founder of Speake-Marin, which launched in 2002 after Peter spent a period of time working as a watchmaker for Renaud & Papi in Le Locle, Switzerland. Speake-Marin is perhaps best known for the Piccadilly case design, named for the London district where Peter spent the early part of his career restoring vintage watches. The Piccadilly case, I’ve always felt, is something of an acquired taste. I’ve come to really love it, and see it as a symbol of an earlier era of independent watchmaking when these artisanal, handcrafted watches made in very small batches were not at the front of anyone’s mind. Times, of course, have changed for the better, and indies are currently having the quite the moment, but it’s worth remembering that a line can be drawn from any of the buzzy new indie watchmakers to surface in the last few years all the way back to Peter and his early 2000s contemporaries. To put it plainly, it’s great that he’s back.  Peter founded PS Horology back in 2022 and has been working on the first collection ever since. The Tsuba watches seen here are expected to be the first of several projects for PS Horology in 2025. While it might not look like it on an initial glance, there’s actually connective tissue between the Piccadilly cases of...

Omega Introduces the Speedmaster Moonphase Meteorite Worn & Wound
Omega Introduces Jan 14, 2025

Omega Introduces the Speedmaster Moonphase Meteorite

Something we’ve learned about the Speedmaster over the years is that it can be, quite literally, anything. The Speedy is effectively a brand unto itself, with watches in the collection that strike just about every note possible in watchmaking. There are traditional vintage inspired Speedmasters, modern and tactical Speedmasters, Speedmasters with a jewelry focus, Speedmasters that exist to display Omega’s prowess in chronometry, and Speedmasters that are overtly obsessed with NASA and space exploration. There are even plastic Speedmasters and Speedmasters with Snoopy on the dial (which of those Speedys is made for children is an open question). Speedys come in all sizes, are made in every metal imaginable (plus some not-metals), and, even though Speedmasters are, if nothing else, chronographs, they’ve been made with a whole bunch of other complications as well. This is all just to say that in the world of Speedmasters, it’s hard to be surprised in 2025. So when Omega began teasing a new Speedy on social media recently and the guessing game began, every suggestion seemed possible.  Today, Omega announced the new Speedmaster Moonphase Meteorite, a 43mm stainless steel Speedy with a meteorite dial (in two finishes) and double moonphase display at 6:00. It also features a new caliber capable of displaying the correct moonphase for both the northern and southern hemispheres.  This isn’t the first time Omega has incorporated meteorite into a Speedmaster. My personal ...