Results for Chronometer (COSC)

A Technical Perspective - All About Omega’s Laboratoire de Précision, a new Chronometer Certification to compete with COSC, Open to all Brands

Omega is one of the largest luxury watchmakers on the market, carrying multiple emblematic models (Seamaster and Speedmaster, to name a few). However, one vital element of the brand’s success lies in its almost unique take on precision. Omega has long been a pioneer in this field, often ranking first in chronometry contests and introducing […]

Swiss COSC establishes the ‘Excellence Chronometer’, a new standard for accuracy

Business News: Switzerland's COSC Unveils 'Excellence Chronometer' Level Of Certification

The launch of a new standard that ensures accuracy within 6 seconds per day, along with new considerations for anti-magnetism and power reserve.

Best Value Accurate & Chronometer Watches - COSC, METAS, High Frequenc

Teddy Baldassarre is an authorized luxury watch retailer of brands like TUDOR, OMEGA, IWC, Grand Seiko, Breitling, Blancpain, Glashütte Original, Zenith, Longines, ORIS, MIDO, Tissot, Hamilton, NOMOS Glashütte, Baume & Mercier, and more.

Switzerland’s COSC To Upgrade Chronometer Certification Standards

New standards to show focus on consumer as secretive organization opens up for first time.

Breaking News: Move Over COSC - Omega Launches A Brand New Chronometer Certification With The Creation Of The Laboratoire de Précision

It's a bold move made all the more impactful mere days ahead of Watches & Wonders.

Serica Bolsters the 5303 COSC Antimagnetic Diving Chronometer from Within

Although Serica has only been around since 2019, it feels like the young watch brand has been around for ages. In my opinion, a lot of that has to do with the maturity in which they conduct themselves, both in brand presence and progression. With any Serica novelty, you can bet that their approach to any watch design is performed with metronomic consistency – typically with minimal branding, steady visual cues, and a general inspiration by way of vintage military timepieces. It seems that any change that’s going to be made within each reference will be incremental, but that doesn’t mean the impact can be monumental. Such is the case with the new and improved Serica 5303 COSC Antimagnetic Diver Chronometer. To understand the latest update to the Serica 5303, we must look within. Serica has opted to keep the movement within the Soprod family, but instead of using the previous Newton P092 automatic, the Serica 5303 COSC now draws its power from the Caliber M100. The Soprod Caliber M100 is buoyed by a glucydur balance, incabloc shock system, a 42 hour power reserve, and most importantly, a 3.2mm movement thickness. With approximately 1.4mm of extra room to play using the transitional movement inside of the 5303 COSC case, Serica has built in several antimagnetic pieces including a soft iron movement holder, soft iron dial and a soft iron inner caseback. As a result, the magnetic resistance for the Serica 5303 COSC diver has skyrocketed from the traditional Swiss standard...

Hands-On: A Triple Review Of The Jaeger-LeCoultre Master Control Chronomètre Collection

We're a few months removed from Watches & Wonders, which gives us some clarity about what was buzz, what was hype, what fell off the wish lists, and what will be a long-term winner. It's looking like Jaeger-LeCoultre had one of the best releases of the fair with the Master Control Chronomètre series. The Master Control line has largely been a dressy take on traditional design cues for a brand people usually think of first for its Reverso. But now, JLC has shown that Master Control can do more. More than just a new case and bracelet, all watches are in-house chronometer-certified 4Hz, 70-hour power reserve movements (COSC does the certification) with a new High Precision Guarantee (HPG) seal, which supplants the former 1000 Hours Control. That new HPG seal means that the brand trials cased watches on four daily-wear specific issues—shocks, positions, altitude, and temperature—over three days, while guaranteeing eight traditional techniques of quality aesthetic finishing. The watches I photographed were brand new and wrapped in plastic, so you have to look past a bit of that to see the quality, but it certainly is there in person. Now with three models in steel and rose gold, with five SKUs (one watch only comes in steel and not gold), measuring 38mm by 8.4mm or 39mm or 9.2mm with 50m of water resistance, the new line brings a lot to the table. Inspired by the brand's Master Mariner Chronomètre line, launched in 1973 as their offering for an integrated bracelet (or adj...

Jaeger-LeCoultre Master Control Chronomètre: JLC's Quiet Sports-Watch Move

The Master Control Chronomètre line lands with an integrated bracelet, a brand-new High Precision Guarantee, and three models. Here's how JLC is positioning against the steel-sports-watch crowd without ever using the words "sports watch".

COSC Raises the Bar: A New Standard for Swiss Chronometry

COSC has announced a significant evolution in how Swiss precision will be measured. For more than fifty years, the organization has certified movements

Rexhep Rexhepi Reveals the Chronomètre Antimagnétique for Only Watch 2023

Having dropped tantalising clues about his creation for Only Watch 2023 a few weeks ago, Akrivia founder Rexhep Rexhepi has finally taken the covers off the Rexhep Rexhepi Chronomètre Antimagnétique. A unique creation with a brand-new movement, the Chronomètre Antimagnétique (RRCA) is a time-only wristwatch with a steel case, one that was inspired by the magnetism-resistant chronometers of the mid-20th century. Its design has clear roots in vintage watches, while the movement features an indirect centre seconds with a hacking, zero-reset mechanism. Initial thoughts About the half the offerings in Only Watch 2023 are from independent watchmakers, but the creations vary tremendously in their originality and effort. Amongst the independents that created genuinely new watches for the event is F.P. Journe, whose Chronomètre Furtif Bleu is the first of a new sports model and likely the only watch ever made by an independent that boasts a tantalum bracelet. At the low-effort end of the spectrum is Moritz Grossmann that added “Only Watch” to the seconds register of a regular-production model and called it a day. The RRCA sits alongside the Chronomètre Furtif Bleu as being impressively original. The RRCA has an newly-designed steel case with a removable outer back and within, a calibre that inherits the distinctive Rexhep Rexhepi aesthetic but is newly developed from the ground up. Even though it is a simple watch with just three hands, the movement is executed in the Mr ...

First Look - The Colourful New Mido Multifort Chronometer1 Racer

One of Swatch Group’s mid-level brands, Mido is beginning to get the attention it deserves with well-designed, robust watches that won’t break the bank. The recent revival of Mido’s 1970s TV-shaped watch, rechristened the Multifort TV Big Date, is a testament to the brand’s knack for transforming vintage designs into coveted models with contemporary specs. […]

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.

Does Mido deliver the best value COSC-certified Swiss in-house chronometers available in 2021?

Is this headline a valid question, a bold claim, or simply the stone-cold truth? My knowledge of the Mido brand has recently been re-ignited. The Swiss brand has been in the game for more than 100 years, but my awareness previously centred on their vintage reissues. I see Mido’s DNA represented in the delightful ’60s … ContinuedThe post Does Mido deliver the best value COSC-certified Swiss in-house chronometers available in 2021? appeared first on Time+Tide Watches.

COSC, METAS or TIMELAB? Why Chronometry Still Matters Despite Atomic Time

Introducing: Serica Downsizes Its Field Chronometer With The 35mm Ref. 7505

What We Know It's time to put aside the debate of big watches versus small watches. I think we can at least agree that options are a good thing, so everyone can get what they want. With that in mind, Serica has released three new, smaller Field Chronometer watches measuring only 35mm by 9.6mm thick with a COSC-certified automatic movement and three new enamel dials. These three new watches, with stainless steel cases, play off the design language of the ref. 6190 with a few tweaks. There's the slightly larger, fixed bezel with pips at 3, 6, 9, and 12 o'clock. They have a double-domed anti-reflective sapphire that should somewhat magnify the smaller dial. The two-tone cream-and-black "Tuxedo" dial is similar to the ref. 6190 TXD, with hand-applied numerals. The other two, the "Minute Critical" dials in black or olive green, aren't that far from the ref. 6190 "Denali" that is already on offer in a larger size, with added 5-minute Arabic numerals. All three have Super-LumiNova C3 lume. Inside the case is the SoProd M100 movement, which is COSC-certified for accuracy, making it a Field Chronometer in both name and function. The caliber runs at 4Hz, is self-winding, and has a 42-hour power reserve. According to Serica, it also has a decorated plate with Côtes de Genève, and while there are no photos of the caseback, I would assume it is still a closed caseback like its big sibling.  Then there's the final major update: the watch comes with a redesigned Bonklip bracelet, fea...

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...

Introducing - The Brellum Pandial Power Reserve Black Titanium Chronometer LE

Independent and proudly small-scale, Brellum thrives carving its niche in modern Swiss watchmaking. Founded by fourth-generation watchmaker Sébastien Muller, the brand produces only 299 pieces per year, each officially COSC-certified, meticulously decorated, and sold directly to end consumers. Following the recent release of the Pandial Power Reserve Chronometer LE in steel, Brellum now offers a […]

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...

Interview - Andreas Wyss, CEO of the COSC, on the Need to Adapt and a “Super-COSC” Certification to Come

If you own mechanical Swiss watches, one of them potentially came to you with a COSC chronometer certificate. But not everyone knows exactly what this certificate means. The COSC is the Contrôle Officiel Suisse des Chronomètres or the Official Swiss Chronometer Testing Institute. COSC certifies Swiss-made movements or watches as chronometers (not to be confused […]

Everything you need to know about COSC

What is a chronometer, or what does it mean to be COSC-certified? Here are all the answers.The post Everything you need to know about COSC appeared first on Time+Tide Watches.

Chronometer Certification in Watches Explained: How-To with Tim Mosso (video)

Omega, Tudor, Chopard, and many more watches all boast “COSC Chronometer” status on their watches, but what exactly does this certification entail? In this episode of How-To, Tim breaks down what exactly a watch needs to achieve to get COSC status and what defines a chronometer.

Bulgari reclaims the throne for the world’s thinnest watch with the Octo Finissimo Ultra COSC

As the name implies, it isn't just the thinnest mechanical watch in the world, it is also the world's thinnest COSC-certified chronometer. Wow.The post Bulgari reclaims the throne for the world’s thinnest watch with the Octo Finissimo Ultra COSC appeared first on Time+Tide Watches.

First Look - The New Steel Brellum Pandial Power Reserve Chronometer LE Black

Independent and deliberately small-scale, Brellum is known (and respected) for following a straightforward formula: strict quality controls, every movement is COSC-certified, and annual watch production is capped at 299 pieces. The brand’s Pandial chronograph series features a tachymeter bezel and telemeter scale, date indication and might be considered the brand’s sportier line. After the 2025 […]

There Are Only 33 Of These: Introducing The Black-Dial Brellum Pandial 43 Power Reserve LE Chronometer

The first Brellum Pandial Power Reserve Chronometer LE I ever saw indeed had a panda dial. The white dial with black sub-registers created the famous look so many desire. The latest Pandial is like a panda suffering from melanism; it’s fully black. It does give this latest Brellum chronograph, a limited edition of just 33 […] Visit There Are Only 33 Of These: Introducing The Black-Dial Brellum Pandial 43 Power Reserve LE Chronometer to read the full article.

A Heavenly “Match” - The Olympique De Marseille × Jacques Bianchi Marseille JB200 Chronometer Limited Edition

“Droit au But,” translated roughly as “Straight to the Goal,” has been Olympique de Marseille’s motto since the club’s foundation in 1899 and appears beneath the “OM” crest. OM is one of the most recognizable clubs in French football. Its greatest achievement came on May 26th, 1993, when OM defeated AC Milan 1–0 in Munich […] Visit A Heavenly “Match” — The Olympique De Marseille × Jacques Bianchi Marseille JB200 Chronometer Limited Edition to read the full article.

Decoding The Master Chronometer: What Does METAS Certification Actually Mean?

A guide to METAS certification and the necessary process for a watch to call itself a Master Chronometer.

Formex Enters The Arena Of Integrated-Bracelet Watches With Its Aria Manufacture Chronometer

As a small brand, Formex has consistently pushed the boundaries of affordable watchmaking. By using new materials, integrating innovations, and simply creating a great, varied collection of watches, the young Swiss brand has stood out in recent years. With the new Aria Manufacture Chronometer, Formex unveils a new milestone for the company. It marks a […] Visit Formex Enters The Arena Of Integrated-Bracelet Watches With Its Aria Manufacture Chronometer to read the full article.

Tudor Introduces A Slimmer Black Bay 58 With Master Chronometer Certification And Another Bracelet For The Black Bay 58 GMT

Tudor expands its lineup of mid-size dive watches with an updated Black Bay 58 and a new bracelet option for the Black Bay 58 GMT. Both watches keep the familiar 39mm case and continue to draw on late-1950s Tudor dive-watch aesthetics. The three-hand model adds technical upgrades, revised case proportions, and Master Chronometer certification. These […] Visit Tudor Introduces A Slimmer Black Bay 58 With Master Chronometer Certification And Another Bracelet For The Black Bay 58 GMT to read the full article.

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.