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Results for Marine Chronometer & The Longitude Problem

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Watches, Stories, & Gear: Mechanical Keyboards, the Werwulf Trailer, and a Stunning New View of the Milky Way Worn & Wound
Jul 4, 2026

Watches, Stories, & Gear: Mechanical Keyboards, the Werwulf Trailer, and a Stunning New View of the Milky Way

“Watches, Stories, and Gear” is a roundup of our favorite content, watch or otherwise, from around the internet. Here, we support other creators, explore interesting content that inspires us, and put a spotlight on causes we believe in. Oh, and any gear we happen to be digging on this week. We love gear. Fixing the Biggest Problem With Mechanical Keyboards I don’t think it would be fair to classify me as a luddite, but I would say I’m more of a nostalgist. While I have made a nice little career for myself online, I do miss when things were a bit simpler. You know, when tech oligarchs didn’t rule the world and I could play my little Flash games on Neopets and it would take four hours to download one song onto my Microsoft Zune. Sure, I have an office now, but it doesn’t have the same charm as a computer room.  This, of course, is bootstrapped by the physical memories, too. The soft grey ball inside the computer mouse, for one. Turning the computer on with my big toe while balancing my dinner plate on my lap. And, of course, the clickity-clackity of the keyboard. It was elevator music to the millions of AOL messages I sent throughout my high school years and the bane of my father’s existence, who swore he could hear it from all the way down the hall. Now I use a Macbook and it’s a soft and gentle tap on my fingertips. Not to quote Joni Mitchell here, but you really don’t know what you got ‘til it’s gone. All the same, I’m glad I’m not alone. It see...

First Look - Breguet Releases 3 new Tourbillon Watches for the 225th Anniversary of its Invention Monochrome
Breguet Releases 3 new Tourbillon Jun 26, 2026

First Look - Breguet Releases 3 new Tourbillon Watches for the 225th Anniversary of its Invention

Precisely 225 years ago on this day (on June 26, 1801, or on 7 Messidor An IX, to use the French Republican calendar in force at the time), Abraham-Louis Breguet was granted the patent for what is, without a doubt, its most famous invention: the tourbillon. Designed to counter the problem of gravity affecting the […]

Vacheron Constantin Brings Back the Traditionelle Twin Beat Perpetual Calendar Worn & Wound
Vacheron Constantin Brings Back Jun 17, 2026

Vacheron Constantin Brings Back the Traditionelle Twin Beat Perpetual Calendar

What is the ultimate first world problem? I can think of a handful. There’s the classic notion that we just have too much content to scroll through, stream, and consume. As the Boss put it, there’s 57 channels and nothin’ on. As I sit here typing up this article on hot early summer day with my AC blasting, I’m realizing it’s getting cold enough in here that I might need to add a layer. Woe is me! Just a few weeks ago, I bought a new iPhone and quickly found that Apple Music hadn’t automatically moved over all of my locally downloaded tunes during the initial data transfer. I was pretty disappointed when I realized only the second half of Turn on the Bright Lights was available to me on a late night drive home over the weekend. I just want to hear “Obstacle 1”! These are all annoyances, for sure. But none of them truly compare to the King of First World Problems, which is very obviously not being able to keep your perpetual calendar sufficiently wound. I mean, have you tried to reset one of these things recently? It can be really frustrating. Plenty of brands, like IWC earlier this year, have made moves to make their perpetual calendar movements more forgiving when resetting. Gone are the days, hopefully, when jumping past the current year means an expensive trip back to the manufacture in Switzerland.  Vacheron Constantin has a slightly different solution, which is to enable your perpetual calendar to remain wound for weeks at a time by allowing the wearer...

Introducing: The Vacheron Constantin Traditionelle Twin Beat Perpetual Calendar Is Back Hodinkee
Vacheron Constantin Traditionelle Twin Beat Perpetual Jun 16, 2026

Introducing: The Vacheron Constantin Traditionelle Twin Beat Perpetual Calendar Is Back

What We Know Vacheron just brought back its incredibly unique Traditionelle Twin Beat Perpetual Calendar, and it's a welcome sight for dedicated collectors of the brand, along with general enthusiasts of unexpected yet innovative takes on complicated watchmaking. If you're not familiar with the original Traditionelle Twin Beat Perpetual Calendar, launched back in 2019, the watch offered an incredibly novel solution to a problem often found within perpetual calendar watches. Let's be honest, though the entire appeal and genius of the perpetual calendar is for someone wearing one watch all day, every day, for the whole year, watches like these are most often owned by those with a large collection to begin with. A weekend for a perpetual calendar in a watch box or drawer would mean that the complication would need to be set again after winding, and so Vacheron introduced this perpetual calendar with a whopping 65-day power reserve. To achieve this, rather than putting in an unfeasibly large mainspring in the barrel, the Traditionelle Twin Beat Perpetual Calendar lives up to its name by offering a new system that allows for switching between two beat rates for the watch—a contemporary high-beat 5Hz frequency with a 4-day power reserve for normal timekeeping during wear, but a much slower 1.2Hz mode with that prolonged power reserve for the "Standby" phase. The Caliber 3610QP comprises two separate gear trains for the two regulating systems, with a series of differentials tha...

Highlights: Exotic Mechanics at Christie’s Hong Kong SJX Watches
F.P. Journe Chronomètre À Résonance Brass May 22, 2026

Highlights: Exotic Mechanics at Christie’s Hong Kong

A menagerie of exotic movements features in Christie’s upcoming Hong Kong auction, Important Watches: Featuring “Kronos: Titans of Time”, “The Eternity” and “The Chronicle” Collections, from Double Splits and double movements to torque management and monitoring. Lot 2352 – F.P. Journe Chronomètre À Résonance (Brass Movement) While the current iteration of the Chronomètre À Résonance is far more elaborate, using a differential to split the trains — each of which contains its own constant force device — this early F.P. Journe Chronomètre À Résonance with its 18k pink gold dial was much more ambitious in its time, developed by an upstart restorationist from Paris in a market that was hostile to independent brands compared to today. Resonance timepieces, or more accurately, those using coupled oscillators, can be traced all the way back to Christiaan Huygens, also known for inventing the pendulum clock and many, many contributions to mathematics and the sciences. He described the coupling of his pendulum clocks as an “an odd kind of sympathy” and sought to exploit this dampening effect to make pendulum clocks viable at sea, though this was ultimately unsuccessful. It would take more than a hundred years for Abraham-Louis Breguet — often hailed as the greatest watchmaker — to bring this phenomena to a watch, and then almost two hundred more for arguably the greatest living watchmaker to bring it to the wrist. That was, of course, François-P...

Serica Introduces the new Ref. 7505 Worn & Wound
Serica Introduces May 21, 2026

Serica Introduces the new Ref. 7505

One of my favorite things is when a brand releases a watch that feels like the watch they always should have made. I’m sure we can all point to examples of this – that feeling that a new watch really belongs in the brand’s catalog, and we’re kind of surprised it never existed in the first place. That’s sort of how I think about the latest release from Serica, the Ref. 7505 Field Chronometer. Doesn’t it seem like Serica always had a 35mm field watch in their collection?  More than any other watch the brand has released to date, this feels like a distillation of what the brand is really about. You’ll recall that they launched with a collection of military inspired field watches all the way back in 2019, which at the time felt like they were already going a little against the grain at just under 38mm in diameter. In the years since, they’ve iterated on this general idea, with an ongoing series of sporty selections rooted in a kind of imagined vintage world, never borrowing too much from any one classic reference, but pulling from a variety of sources to create something that is uniquely their own. Part of that has always meant keeping the watches fairly compact. Looking over the press materials for this watch and thinking about the direction the brand has gone in, I wonder if, if circumstances had been different, they may have started here, with a 35mm field watch, to begin with.  This is unquestionably the right time to introduce a watch like this, at a mom...

First Look - The Two-Tone & Chocolate Girard-Perregaux Laureato Chronograph 42mm Monochrome
Girard-Perregaux Laureato Chronograph 42mm May 7, 2026

First Look - The Two-Tone & Chocolate Girard-Perregaux Laureato Chronograph 42mm

The Laureato is Girard-Perregaux’s answer to the integrated luxury sports watch. Born in 1975 as a chronometer-certified quartz sports watch, Girard-Perregaux revived the Laureato in 2016 as a limited edition to celebrate the brand’s 225th anniversary, and later as a collection in 2017. Produced three years after Gérald Genta’s landmark Royal Oak but a year […]

The Rivanera Gets Echo/Neutralized By Seconde/Seconde/ Fratello
May 1, 2026

The Rivanera Gets Echo/Neutralized By Seconde/Seconde/

It’s always fun to see a seconde/seconde/ take on a popular watch. With the many whimsical releases Romaric André created while collaborating with brands, you sometimes wonder whether he is ever short of good ideas. So far, though, that hasn’t been a problem. If anything, I have seen the releases become better over time. The […] Visit The Rivanera Gets Echo/Neutralized By Seconde/Seconde/ to read the full article.

First Look - The New Zenith G.F.J. in Tantalum and Yellow Gold, Continuing the Legacy of the Calibre 135 Monochrome
Zenith G.F.J Apr 15, 2026

First Look - The New Zenith G.F.J. in Tantalum and Yellow Gold, Continuing the Legacy of the Calibre 135

When Zenith brought back the legendary Calibre 135 last year in the G.F.J. collection, it was a tribute to its 160-year history. Also, it signalled the return of one of the most celebrated chronometer movements. Now, the brand expands the collection with two new G.F.J interpretations: a tantalum edition with an onyx dial and diamonds, […]

Fratello Talks: How Much Does Chronometer Certification Matter? Fratello
Apr 9, 2026

Fratello Talks: How Much Does Chronometer Certification Matter?

“Chronometer” is one term that frequently comes up in watchmaking. We see it stamped on dials, highlighted in marketing materials, and often used as a synonym for “high quality.” But how much does chronometer certification actually matter to us as collectors? In this episode of Fratello Talks, Nacho is joined by Daan and RJ to […] Visit Fratello Talks: How Much Does Chronometer Certification Matter? to read the full article.

In-Depth: Understanding Resonance in Watches SJX Watches
F.P. Journe s Chronomètre à Résonance Feb 19, 2026

In-Depth: Understanding Resonance in Watches

Resonance watches are among the most elusive machines in modern watchmaking. Creations such as F.P. Journe’s Chronomètre à Résonance perform well at auctions, commanding high prices. While their rarity and appeal are undeniable, watches that purport to harness resonance tend to be viewed with a degree of skepticism. A measure of skepticism is understandable - the concept of sprung balances becoming almost magically coupled is anything but straightforward and requires a profound understanding of oscillators in general.   This story seeks to shed some light on the concept of coupled oscillators by explaining the two models of coupling and explore the nuances of each system. Before exploring resonance, the reader is encouraged to review the basics of sprung oscillators and isochronism in order to become more familiar with the hairspring and balance wheel model.  The F.P. Journe Chronomètre à Résonance Souscription No. 2 sold for more than CHF3 million in November 2025. A confusion of terms First, the term resonance itself requires definition. In classical physics (mechanics, electrical engineering, signal processing, etc.) resonance is a phenomenon where a system vibrates under the influence of an external driving force that matches the system’s eigenfrequency (natural frequency). This is to say that a system at rest, which includes mass and spring elements, can be excited into a state of resonance by an external force when particular conditions are met. An imp...

A Closer Look At COSC’s New Excellence Chronometer Certification Fratello
Feb 17, 2026

A Closer Look At COSC’s New Excellence Chronometer Certification

Contrôle Officiel Suisse des Chronomètres (COSC) is the largest Swiss independent testing facility for watch movements. Founded in 1973, this non-profit foundation aims to guarantee the precision of Swiss watches through a neutral, independent, and rigorous method. Watches with movements that passed the tests can be called “COSC-certified chronometers,” accurate to within -4/+6 seconds per […] Visit A Closer Look At COSC’s New Excellence Chronometer Certification to read the full article.

Affordable Vintage: the Longines Grand Prize Worn & Wound
Longines Grand Prize Longines Feb 4, 2026

Affordable Vintage: the Longines Grand Prize

Longines is a storied and well-respected Swiss watch manufacture that formed in 1832 and has continued uninterrupted to this day. From the first wrist chronometer in 1911, to groundbreaking flyback chronographs in the 1930s, to the world’s first hi-beat wrist chronometer in 1959, Longines holds their own in the watchmaking world.  My favorite period for watches is the 1950s through the 1970s and Longines was one of the top accessible brands during that time. In 1954 Longines began a marketing strategy of product families, launching the Conquest line of watches. In 1957 they introduced the Flagship line, adding to what would become a large group of watch families, many of which are still made today. Other lines that came later include the Admiral, the Ultra-Chron and the Grand Prize. The Grand Prize line was named in honor of the multitude of watchmaking awards and honors that Longines had accumulated over the decades. It was a relatively short-lived family, produced from about 1958 to 1964 according to my research. I have found that the majority of Longines watches produced during these decades were all fairly equal in quality and craftsmanship, with most of the differences in the families being design related. The Conquests were rugged and sporty, on par with the early non-diver Omega Seamaster watches. The Flagship series were dress watches, while the Admiral line was a mixture of both. The Grand Prize family were pretty much all thin, elegant everyday type dressier w...

Hands-On With The Vostra Vector: A Retro-Futuristic Chronograph That’s Built To Be Worn Fratello
Jan 18, 2026

Hands-On With The Vostra Vector: A Retro-Futuristic Chronograph That’s Built To Be Worn

There’s a certain kind of satisfaction that only a chronograph can offer - the tactile click of the pushers, the sweep of the seconds hand, the quiet excuse to time things that probably do not need timing at all. You know exactly what I mean; we all do it. The problem is that many chronographs […] Visit Hands-On With The Vostra Vector: A Retro-Futuristic Chronograph That’s Built To Be Worn to read the full article.

What is a Chronometer Watch? A Guide to Ultra-Precise Watches Teddy Baldassarre
Nov 28, 2025

What is a Chronometer Watch? A Guide to Ultra-Precise Watches

When a watch touts on its dial that it is a "Chronometer" or an "Officially Certified Chronometer" or even a "Superlative Chronometer," what exactly does that mean? How does a chronometer watch differ from a watch that does not make that claim? For that matter, a newbie to the timepiece game might ask, what is the difference between a watch with "chronometer" on the dial and a watch with "chronograph" on the dial? In this comprehensive guide, we attempt to answer all of your burning questions about chronometer watches and what sets them apart. [toc-section heading="The Chronometer Throughout History"] Our original, classical definition of a chronometer can be traced back to the golden age of seafaring exploration in the 18th Century, when ships required the use of a highly accurate onboard clock that enabled their navigators to determine longitude in order to avoid the perils of running aground or veering hopelessly off course. The man credited with developing the first of these “marine chronometers” was legendary British watchmaker John Harrison; his invention facilitated the celestial navigation used at the time by navigators at sea to determine their ship’s position in coordination with a sextant. Marine chronometers, which were essentially highly accurate clocks mounted on gimbals inside wooden boxes, were among the first portable timepieces and were instrumental in the global seagoing trade that helped build our modern, interconnected world. Ulysse Nardin, foun...

First Look - The Green Bovet Récital 30 Worldtimer Seddiqi Limited Edition Monochrome
Bovet Nov 19, 2025

First Look - The Green Bovet Récital 30 Worldtimer Seddiqi Limited Edition

Bovet‘s Récital line has always been where Pascal Raffy lets invention roam free: oversized domes, theatrical displays and genuinely mindblowing complications. The Récital 30 continues that tradition while making a pragmatic, travel-ready turn. Launched as a scaled-down, wearable sibling to the Récital 28, the Récital 30 focuses on one problem and solves it elegantly with […]

Longines’ Ultra-Chron Classic is a Double-Certified, High-Beat Chronometer SJX Watches
Jaeger-LeCoultre Geophysic E168 or IWC Oct 13, 2025

Longines’ Ultra-Chron Classic is a Double-Certified, High-Beat Chronometer

Longines continues to mine its archive to good effect with the Ultra-Chron Classic, a faithful reissue of the brand’s pioneering high-frequency wristwatch first launched in 1967. The Ultra-Chron Classic is more than just a remake of a vintage watch. While it has a clean, period-correct vintage aesthetic, the mechanics are entirely modern, namely a high-beat, 5 Hz automatic movement that is both COSC chronometer and TIMELAB certified. Initial thoughts Longines does well at bringing back beloved designs from the past, but built to modern standards. The Ultra-Chron Classic is the latest in a long line of historical reissues that began nearly two decades ago with the bestselling Legend Diver. The Ultra-Chron Classic is impressively faithful to the original in style, but because of that, not especially exciting in terms of design, retaining the all-business look that was common among high-performance gentlemen’s wristwatches of the era; the same criticism could be leveled at the Jaeger-LeCoultre Geophysic E168 or IWC Ingenieur ref. 666. In other words, the dial, hands, and indices are mostly true to the source material, but this pared-back look may have a harder time standing out in today’s market than it once did. Dressy? Classic? Or plain? Looks aside, the Ultra-Chron Classic is modern Longines at its best: a solid build, a brand-exclusive movement, proper sizing, and sensible pricing. The movement in particular stands out for being notable high-spec with its 36,000 bea...