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Results for ISO 6425 (Diver's Watch Standard)

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First Look - The IWC Portugieser Chronograph Ceratanium, the Icon in Dark Mode Monochrome
IWC Portugieser Chronograph Ceratanium Feb 26, 2026

First Look - The IWC Portugieser Chronograph Ceratanium, the Icon in Dark Mode

Since its introduction in 1998, the classic IWC Portugieser Chronograph (ref. IW3914) has barely evolved visually. It has only undergone a technical upgrade in 2020, with the introduction of a new generation featuring a manufacture calibre inside (ref. IW3916). And that consistency in the design and overall sporty-chic, nautically-inspired spirit is what makes this watch […]

Introducing: The All-Black IWC Portugieser Chronograph In Ceratanium Fratello
IWC Portugieser Chronograph Feb 26, 2026

Introducing: The All-Black IWC Portugieser Chronograph In Ceratanium

I have always thought of the IWC Portugieser as an elegantly styled chronograph or a clean time-only watch. Until today, that is, because the brand from Schaffhausen introduces an all-black Portugieser Chronograph in Ceratanium. Yes, please take a moment to let that sink in. Previously, the light, scratch-resistant Ceratanium material was used only in IWC’s […] Visit Introducing: The All-Black IWC Portugieser Chronograph In Ceratanium to read the full article.

Raymond Weil’s Well-Dressed Millesime “Tuxedo” SJX Watches
Raymond Weil Feb 26, 2026

Raymond Weil’s Well-Dressed Millesime “Tuxedo”

An eighties icon that is finding fresh footing, Raymond Weil has extended its GPHG-winning dress watch collection with the Millesime Small Seconds 39 mm “Tuxedo”. Available in three appealing colourways, the Millesime features Art Deco-inspired typography that brings a surprising degree of energy to the line-up’s familiar sector-style dial. Initial thoughts Raymond Weil was one of the biggest names in Swiss watchmaking in the 1980s and 1990s. Raymond Weil himself was one of the first entrepreneurs to see a future for mechanical watchmaking amidst the rubble of the quartz crisis, launching his eponymous brand in 1976. While peak production is in the past, the brand seems to have rebounded with a collection of well-received dress watches and savvy limited editions. The new Millesime Small Seconds embodies the carefully considered details that have underpinned the brand’s recent resurgence. It’s not revolutionary by any means, but at just US$2,295 it offers an affordable entry point to the world of Swiss dress watches. Affordability is one thing, but appeal is another. Fortunately the 39 mm Millesime hits many of the right notes in each of the three colourways, including a so-called ‘tuxedo’ configuration in either classic back and white or on-trend burgundy, as well as a dark blue option that might be the dark horse favourite. Art Deco trio All three models have a few key things in common, starting with the stainless steel case. The Millesime measures 39 mm in ...

TAG Heuer Connected Calibre E5 X Formula 1 Edition: The Smartwatch Built for F1 Fans WatchAdvice
TAG Heuer Connected Calibre E5 X Feb 25, 2026

TAG Heuer Connected Calibre E5 X Formula 1 Edition: The Smartwatch Built for F1 Fans

As the F1 season for 2026 is about to get underway, official timing partner TAG Heuer has released a special Connected Calibre E5 X Formula 1 edition that puts you right in the action! What We Love 45 mm case size is perfect for a fitness-oriented smart watch for those with average and above wrists The ability to customise the interface and displays Interconnectivity with the F1 app – perfect for F1 fans What We Don’t Spoiler alerts if you want to watch the races after they have run (like I do) Smart watches are not for everyone, so consider if this is for you It is not designed for smaller wrists, but the 40 mm Connected range fills this void now Overall Score: 8.9 / 10 Value for Money: 9/10 Wearability: 9/10 Design: 9/10 Build Quality: 8.5/10 The Formula 1 season is upon us again, and 2026 marks TAG Heuer’s second year as the sport’s official timing partner. To kick off the season, which starts next week in Melbourne, TAG Heuer has released a special edition Connected E5 smartwatch designed with Formula One fans in mind. Based on the new Connected E5 45mm models released last year, this isn’t just a cosmetic redesign. The watch delivers real-time Formula One data, giving fans up-to-date information throughout the season and across each race weekend via a direct link with the F1 App and the FIA. The new TAG Heuer Connected Calibre E5 x F1 Edition First Impressions I reviewed the Connected E5 last year in the 40 mm case size, and it proved excellent for track...

The 10 Best Gold Chronographs in 2026 Teddy Baldassarre
Feb 24, 2026

The 10 Best Gold Chronographs in 2026

Let's face it: a gold chronograph is not exactly the most subtle style of wristwatch you can sport. Combine the high complication, the complex multi-level dial, and the gleaming precious-metal execution of the case (and, in some instances, also the bracelet), and the result tends to be a prominent, weighty, and expensive timepiece that inevitably attracts attention. Unlike standard, three-handed gold dress watches, gold chronographs are not built to be shy, discreetly hiding their assets beneath a shirt cuff. All the more reason, then, to make sure that if you're bold enough to rock one of these watches, that the face it's presenting to the world is one that inspires awe and admiration. Here are 10 of our favorites from an elite lineup of respected watchmakers.  [toc-section heading="Audemars Piguet Royal Oak Frosted Gold Selfwinding Chronograph"] Price: $95,400, Case Size: 41mm, Case Height: 11mm, Lug Width: 23mm, Crystal: Sapphire, Water Resistance: 50 meters, Movement: Automatic Audemars Piguet Caliber 4401 Audemars Piguet’s frosted white gold, used here for the 41mm case of a vibrant, blue-dialed chronograph within Audemars Piguet’s flagship Royal Oak collection, is achieved through a process of hammering the gold with a diamond-tipped tool to create tiny indentations - a process that dates back to ancient Florence. The dial’s surface is enhanced with the signature Royal Oak Grand Tapisserie texture and highlighted by contrasting golden-toned subdials at 3, 6,...

Moser’s Streamliner Goes All-Ceramic for the First Time SJX Watches
H. Moser & Cie dips Feb 24, 2026

Moser’s Streamliner Goes All-Ceramic for the First Time

H. Moser & Cie. dips its toes into ceramic for the first time with the Streamliner Tourbillon Concept Ceramic, a bold watch that blends an original design with the high-tech proprieties of ceramic. Despite being a variation of a well-known model at its core, the new Streamliner is unexpectedly different and appealing, especially with a hand-finished ceramic bracelet, an unusual feature even in its segment. Initial thoughts The use of ceramic materials in watches is no longer a novelty. The inert and hard material is appealing for its near-invulnerability to scratches and high tech feel. Ceramics are typically employed for either for aesthetic or technical purposes, but usually for watch cases, while ceramic bracelets are almost exclusively the preserve of large brands that can afford working with the hard-to-machine material.  Though still a niche brand, H. Moser & Cie.’s bestselling Streamliner is dressed entirely in ceramic, with a ceramic case paired with a ceramic bracelet. An all-ceramic bracelet is a rare sight from a brand of Moser’s scale. The matte, brushed finish of the ceramic exterior is at the opposite end of the colour spectrum compared with the bright red yet minimalist dial, giving this the signature Moser look. The granular, glossy finish of the fired enamel dial contrast and complements the matte, stealthy sheen of ceramic.   The watch is paradoxical in some ways. Pairing Moser’s first ceramic case and bracelet with a tourbillon is somewhat incong...

Introducing - The New Rose Gold Edition of the Krayon Anyday Monochrome
Krayon Feb 23, 2026

Introducing - The New Rose Gold Edition of the Krayon Anyday

Rémi Maillat, a watch design engineer, is behind the independent Krayon brand and creates watches that centre on our connection with natural time cycles. Krayon’s award-winning Everywhere watch, which charts sunset and sunrise times at any location worldwide, was succeeded by Maillat’s slightly simpler Anywhere watch, showing the length of the day along with sunrise and […]

Join Worn & Wound and Arken in London to Celebrate British Watchmakers’ Day Worn & Wound
Feb 23, 2026

Join Worn & Wound and Arken in London to Celebrate British Watchmakers’ Day

The third annual British Watchmakers’ Day is almost here, and once again members of the Worn & Wound team will be on the ground in London for the event. On March 7, dozens of UK based brands will exhibit in London’s Lindley Hall to support the Alliance of British Watch & Clock Makers. This year, Editorial Director Zach Kazan and Worn & Wound co-founder Zach Weiss will be on hand to bring you all the latest from London. They’ll be talking with brands and enthusiasts at the event, as well as getting a look at the many limited editions launching at the show. If you’re in London for the event (or just in London!) we hope you can join us March 7, after the show, for a get together at a London pub to celebrate the weekend. We’re once again partnering with our friends at Arken to host a fun and casual evening for enthusiasts to come together to talk watches. Join the two Zachs and Arken founder Kenneth Lam for drinks, refreshments, and lots of good conversation. If you’re able to attend, please use this link to RSVP. Space is limited, so be sure to RSVP soon. Details on the event location will be provided to attendees prior to the get together. We’re excited to see you there! The post Join Worn & Wound and Arken in London to Celebrate British Watchmakers’ Day appeared first on Worn & Wound.

First Look - The New Ulysse Nardin Freak X Gumball 3000 Edition 2 Monochrome
Ulysse Nardin Freak X Gumball 3000 Feb 23, 2026

First Look - The New Ulysse Nardin Freak X Gumball 3000 Edition 2

Collaborations between watch brands and lifestyle events are frequent, some have become commonplace, and a few feel naturally coherent. Gumball 3000 is one of them. Since its launch in 1999, the 3,000-mile rally has become a moving (quite literally) platform for performance, individuality and spectacle, rather than a traditional competition; this year, the 100 selected […]

Watches, Stories, & Gear: A New Lord of the Rings Adaptation Hits the BBC, Phone Straps from Peak Design, and More EDC News Worn & Wound
Feb 21, 2026

Watches, Stories, & Gear: A New Lord of the Rings Adaptation Hits the BBC, Phone Straps from Peak Design, and More EDC News

“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. Big I Design Unveils the Ti Manu Big I Design, the Tennessee-based “one-stop shop for titanium EDC accessories”, unveiled their newest knife design, the Ti Manu. Designed in collaboration with Ken Onion Jr, son of the Legendary Ken Onion, the Manu retains Big I’s “two screw” design, and is the first time that Big I has worked with an outside designer on one of their knives. Currently available to order through Kickstarter, the Manu features a 3.25” S90v blade with a flat grind modified drop point, Grade 5 Ti scales, and can be configured to use either washers or bearings, a feature not many knives offer. With dual thumbstuds and a reversible pocket clip, the Manu can feel right at home in the pocket of left and right-handed EDC enthusiasts. For more information on the all-new Manu, visit the Kickstarter page. Leucadia Blade Co’s LandShark Two California-based knife brands, Pro-tech Knives and Leucadia Blade Co, have teamed up to release an all-new fixed blade design dubbed the LandShark. Crafted from legendary MagnaCut steel, the LandShark features a 3.5” drop point blade, 8” overall length, and weighs in at 4 ounces while offering a unique combinatio...

Cutting Through The Noise With The Quiet Side Of High Horology Fratello
Feb 21, 2026

Cutting Through The Noise With The Quiet Side Of High Horology

High horology in 2026 often comes wrapped in noise - big launches, dramatic case shapes, exposed mechanics, and a constant push to be the most talked-about watch of the week. Yes, I do enjoy that world. Modern, design-led independence is where much of the creativity happens. But there’s another tier of luxury independent watchmaking running […] Visit Cutting Through The Noise With The Quiet Side Of High Horology to read the full article.

Seiko To Host The “Power Design Project Presents: Passionately And Obsessively Crafted Watches” Exhibition Fratello
Seiko Feb 21, 2026

Seiko To Host The “Power Design Project Presents: Passionately And Obsessively Crafted Watches” Exhibition

Flying on Tuesdays or Wednesdays is usually the friendliest for your wallet. And the month of March also falls into that category. Excuse me for getting a little ahead of myself. Let me explain why I’m providing these potentially superfluous travel tips. The reason is a watch event taking place in Tokyo, Japan. From March […] Visit Seiko To Host The “Power Design Project Presents: Passionately And Obsessively Crafted Watches” Exhibition to read the full article.

Seconde/Seconde/’s Cutting Take on the Citizen Tsuyosa SJX Watches
Citizen Tsuyosa Citizen one Feb 21, 2026

Seconde/Seconde/’s Cutting Take on the Citizen Tsuyosa

Citizen, one of the world’ largest watchmakers by numbers, teams up with niche Parisian watch customizer Romaric André for a surprisingly good collaboration with the Citizen Tsuyosa seconde/seconde/. Creative, quirky, and very affordable, the Tsuyosa collaboration depicts the aftermath of the minutes hand slicing through the applied hour markers. And it does it quite well: the artfully positioned hour markers really do look like they have been cut in half. Initial Thoughts Citizen’s latest Tsuyosa is interesting, clever, and affordable. In fact, it is only around US$20 more expensive than the entry level Tsuyosa, making it something of a no-brainer for someone who wants a well-priced watch with a sense of humour. Like Seiko’s “5KX”, the Tsuyosa is an ideal platform for this project, as the model has intrinsic appeal as an integrated bracelet sports-adjacent watch, while also being affordable enough to be an impulse buy based on a cool dial. Nitpickers might point out that a pixellated sword isn’t sharp enough. The pixel art “sword” minute hand may be seconde/seconde/’s best known motif, but it also requires suspension of belief that the hour markers have been cleaved in twain by the minutes hand. Which is unfortunate, as the effect is otherwise so well executed. Of course, without the 8-bit katana it wouldn’t be immediately recognisable as a seconde/seconde/ project, but that is true of many of the best Mr André’s best works, such as the Uncatchable...

IWC Ingenieur Automatic 42 Black Ceramic Review: Stealth Meets Genta Design WatchAdvice
IWC Ingenieur Automatic 42 Black Feb 20, 2026

IWC Ingenieur Automatic 42 Black Ceramic Review: Stealth Meets Genta Design

The IWC Ingenieur Automatic 42 Black Ceramic is a stealth watch with Genta’s DNA baked into the material. But does it stand on its own? Let’s find out! What We Love The Ingenieur design is adapted to black ceramic Dial legibility is still present Finishing of the material makes this a standout watch What We Don’t Lack of the quick link adjustment system on the bracelet The all-black look may not be for everyone’s tastes The 42 mm sizing makes this watch wear different to the Ingenieur 40 and may not suit a smaller wrist Overall Rating: 8.6 / 10 Value for Money: 8.5/10 Wearability: 8/10 Design: 9/10 Build Quality: 9/10 The Ingenieur dominated IWC’s 2025 Watches & Wonders releases, expanding into new sizes and materials. And, of course, there was the quickly sold-out green dial inspired by the vintage Ingenieur SL worn by Brad Pitt in F1: The Movie. But one model possibly stood apart from the rest: the 42 mm all-black ceramic Ingenieur. Not because it was louder, but because it fundamentally changed how the Ingenieur is built, worn, and perceived. We were lucky to catch up with IWC’s CEO, Chris Grainger-Herr, who explained that developing the Ingenieur in an all-ceramic case and bracelet wasn’t as simple as remaking the watch in a different material. Ceramic is notoriously hard to work with, and it is not a case of a simple material swap. It requires a lot more attention – one reason why the Ingenieur is in a slightly larger 42 mm size. Myself, Chris Grai...

The Audible Joy of Alarm Watches Worn & Wound
Vulcain Feb 20, 2026

The Audible Joy of Alarm Watches

One of the most useful watch complications in horological history is also one of its most forgotten.  The ring of a mechanical alarm may seem like a lost artifact, like a rotary phone dial or a manual transmission, all once the necessities of 20th century civilization. And yet, functionality of a settable and mechanical-winding alarm into the tiny confines of a wristwatch is an impressive mechanical feat, one underrated among dive bezels, world timers, pulsations scales, and tachymeters.  The alarm watch was meant for the everyman, whether they’re travelers, titans of industry, or merely early risers. Just like there is appreciation for a watch’s ability to do more than just tell time, there is the aural sensation for a watch to produce something more for the senses than just sight. Eterna was the first to patent an alarm caliber as early as 1908, eventually introducing an alarm wristwatch in 1914 at the Swiss National Exhibition in Berne. It was an impressive achievement, but it wouldn’t last: there was the problem that the alarm could only sound for less than 10 seconds, barely enough to rouse a moderate sleeper, as well as the fact that when the alarm was set, accuracy suffered.  However, the Eterna did achieve something significant: it spurred Vulcain, in nearby La Chaux-de-Fonds, to begin developing its own alarm mechanism in 1942. The resulting Vulcain Cricket, debuting in 1947, fixed its predecessor’s shortcomings: namely, separate barrels for the alarm s...

Citizen and seconde/seconde/ Launch a Fun and Affordable Tsuyosa Limited Edition Worn & Wound
H. Moser Spinnaker Maen Feb 20, 2026

Citizen and seconde/seconde/ Launch a Fun and Affordable Tsuyosa Limited Edition

For years now, Romaric Andre, better known as seconde/seconde/, has been collaborating with watch brands of all kinds on creative limited editions that effectively serve as visual puns. He’s applied his unique sense of humor and aesthetic to watches made by H. Moser, Spinnaker, Maen, and many more brands at every conceivable price point. We talked to him about his process and art here. This is all to say, watch enthusiasts have a pretty good understanding of seconde/seconde/ at this point. That’s a good thing, on one level, as it means his name (or his pseudonym, at least) is out there. But it also makes it harder to surprise, which was so much a part of the charm of those early collaborations.  The latest from seconde/seconde/ is about as good a distillation of what he’s all about as I can think of, and represents a real opportunity for enthusiasts who have been waiting for something affordable and representative from the designer to latch onto. The new watch, a collaboration with Citizen, is a limited edition of that brand’s Tsuyosa integrated bracelet sports watch. This is a platform that has proven to be quite popular for Citizen in recent years, offering a way to get into the normally high priced world of integrated bracelet sports watches for a minimal initial investment. I wrote about my own experience with a Tsuyosa here, and stand by my thesis that it’s a great way to get a feel for this type of sports watch. The new limited edition features a sunray bl...

Introducing - The Summer-Ready Citizen Tsuyosa Shore, now with Rotating Bezel Monochrome
Citizen Tsuyosa Shore now Feb 20, 2026

Introducing - The Summer-Ready Citizen Tsuyosa Shore, now with Rotating Bezel

Ever since its introduction in 2022, the Citizen Tsuyosa collection has left its mark on the accessible, sporty-chic, automatic watch market. In a nutshell, it is one of the most advisable models for anyone looking for a fairly-priced, stylished and well-built watch. Over the years, we’ve seen several evolutions, with new dial colours, a smaller […]

The MeisterSinger Panthero Jumping Hour Celebrates The Brand’s 25th Anniversary Fratello
Audemars Piguet presented Feb 20, 2026

The MeisterSinger Panthero Jumping Hour Celebrates The Brand’s 25th Anniversary

There’s something in the water of the watch world. No idea what it is, but it’s making brands launch jump-hour watches. It started in 2025 with Cartier, Bremont, and Chronoswiss, to name but a few, and this year, Audemars Piguet presented a mechanical digital watch. The MeisterSinger Panthero Jumping Hour is yet another watch that […] Visit The MeisterSinger Panthero Jumping Hour Celebrates The Brand’s 25th Anniversary to read the full article.

Introducing: The Ba111od Chapter 8 Family Legacy Special Editions Fratello
Feb 19, 2026

Introducing: The Ba111od Chapter 8 Family Legacy Special Editions

Until now, I’ve spent most of my time looking at Ba111od’s integrated-bracelet sports watch, the Chapter 7. With that piece, the brand has created an affordable entry into this popular genre. But what about other models in the lineup? Today, we’ll look at the Chapter 8. However, this is a special pair of watches celebrating […] Visit Introducing: The Ba111od Chapter 8 Family Legacy Special Editions to read the full article.

Orient Updates the Bambino with a New No Date Version of the Enthusiast Favorite Worn & Wound
Orient Feb 18, 2026

Orient Updates the Bambino with a New No Date Version of the Enthusiast Favorite

The Orient Bambino is one of those watches that’s an undisputed enthusiast classic. For almost everyone currently involved in our hobby, they’ve come across the Bambino in one way or another. It’s one of the most recommended enthusiast watches for beginners because of its classic dress watch style, reliable mechanical movement, and authentic brand history and credibility. It’s a watch that immediately puts you inside of our community.  If there was an ongoing critique of the Bambino, it might be that until now it had only been available with a date complication. This flies in the face, somewhat, of traditional dress watch norms, but is a common concession that larger watch brands make for the modern, non-enthusiast consumer. After what must have been years worth of feedback from collectors, Orient has just introduced new Bambino models without a date that seem aimed squarely at the collector community.  The new Bambino 38 No Date is available in white, ivory, green and brown dial options, as well as a gray limited edition of 3,300. Dials have a pleasing symmetry thanks to the lack of a date aperture, with Roman numerals at the even numbered hours and simple baton indices elsewhere. The perimeter of the dial has a hash mark minute track in either white or black depending on the dial color.  The Bambino 38 No Date runs on the new F6524 automatic movement, which has a power reserve of 40 hours. Orient makes simple but reliable automatic movements which are notable ...

Introducing - Girard-Perregaux Pays Tribute to the Year of the Horse with a Special La Esmeralda Tourbillon Monochrome
Girard-Perregaux Pays Tribute Feb 18, 2026

Introducing - Girard-Perregaux Pays Tribute to the Year of the Horse with a Special La Esmeralda Tourbillon

Since yesterday, China has started the New Year festivities, celebrating the Year of the Horse. Like every year, we’re seeing watch brands launching dedicated limited editions, as listed here. A bit late to the show, Girard-Perregaux is presenting its own take on the concept. But what the brand has done is, undoubtedly, the most exclusive horse-themed […]

Bremont Introduces the Terra Nova Jumping Hour Stealth Black Worn & Wound
Bremont Introduces Feb 17, 2026

Bremont Introduces the Terra Nova Jumping Hour Stealth Black

Certain watch niches are riskier than others; for instance, seemingly every brand has tried a dive watch or chronograph because they are guaranteed crowd pleasers with straightforward functionality, whereas a world timer or moonphase complication is a little trickier to market to a general audience. In that corner of hyperniche sits the jumping hour watch, which to a non-watch nerd, is both visually and functionally baffling. But Bremont is no stranger to the jumping hour concept, having released successful models with the complication in the recent past. How have they fared with their latest iteration, the Terra Nova 38 Stealth Black? Let’s jump in and find out. While a seasoned horological expert may be familiar with a jumping hour complication, the casual shopper likely isn’t: basically, instead of displaying a sweeping hour hand, a jumping hour watch points to the current hour and “jumps” to the next hour once 60 minutes have elapsed. Conversely, it may instead display the hour in a window, with an imprinted disc moving below that ticks over to the next digit, much like a date window. The Stealth Black opts for the latter presentation, which gives it a clean, retro-futuristic design that differs from previous models in the brand’s jumping hour catalog, and their Terra Nova line more broadly. As the name suggests, the Stealth Black is characterized by its 38mm black DLC stainless steel case, finished in black diamond carbon-like coating, which gives it a sci-f...

Meistersinger Introduces the Archao Worn & Wound
MeisterSinger Feb 17, 2026

Meistersinger Introduces the Archao

The one handed watch is a curious thing. On the face of it, it seems illogical. On a mechanical watch, stripping away a more precise minute hand in favor of a single hour hand negates one of the things enthusiasts covet most: precision. Or, at least, the relative precision. Things like COSC certification and the hard work and ingenuity that go into making mechanical movements become secondary when you pull back sufficiently far from an ability to clock the time to the exact second (indeed, the COSC will not certify any watch without a seconds hand).  But removing that hand is additive, as well. It forces the designer of a watch to think very critically about how that hand is going to tell the time, and the thing that actually defines one handed watches is not so much the fact that they only have a single hand, but the way in which that hand interacts with any timing markers on the dial. There are different approaches, of course. Avant-garde designs might strip out markers altogether, so that a dial’s texture or material can be the singular focus of a piece. This, to me, feels like the most jewelry oriented option possible. Another approach, and the one most often favored by Meistersinger, a brand known primarily for their one handed watches, is to focus like a laser on readability at a glance, designing markers and indices that are large enough and graduated to a degree that makes it relatively easy to get the precise time at a glance. I often think about the time I spe...

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.