Results for Chronometer (COSC)

Introducing Doxa SUB 300 Carbon COSC

The Glashütte Original Senator Chronometer Tourbillon & Other 2020 Novelties

Glashütte Original lives up to its name.

Is the COSC Excellence Chronometer Certification late to the party? Or just what the watch world needs?

Andrew O'Connor interrogates who and what COSC's stricter new chronometer certification is actually intended for.The post Is the COSC Excellence Chronometer Certification late to the party? Or just what the watch world needs? appeared first on Time+Tide Watches.

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.

COSC unveils stricter new “Excellence Chronometer” standard + A. Lange & Söhne opens new Chicago boutique

For the 50th anniversary of the 3159 standard, COSC has introduced a stricter new "Excellence Chronometer" tier of certification.The post COSC unveils stricter new “Excellence Chronometer” standard + A. Lange & Söhne opens new Chicago boutique appeared first on Time+Tide Watches.

What is a chronometer? Demystifying COSC, METAS, Grand Seiko Standard, and more

We explain the difference between COSC, METAS, Superlative, and any other chronometer certification method.The post What is a chronometer? Demystifying COSC, METAS, Grand Seiko Standard, and more appeared first on Time+Tide Watches.

Konstantin Chaykin ThinKing, the New World’s Thinnest Mechanical Wristwatch: Expect the Unexpected

So how thin is the ThinKing? Just 1.65 mm, beating the previous record holder, the Bulgari Octo Finissimo Ultra COSC, by just 0.05 mm.

New releases from Grand Seiko, Garrick, Tissot, Bulova and more

Novelty drops are picking up again, and thanks to the upcoming Geneva Watch Days fair at the end of the month, there will be plenty more to explore. For now, here are ten new watches from last week, including architecture-inspired timepieces, colourful katana-inspired dials, and watches that have more classic sensibilities. Glashütte Original Senator Chronometer … ContinuedThe post New releases from Grand Seiko, Garrick, Tissot, Bulova and more appeared first on Time+Tide Watches.

The Naked Watchmaker explains what it takes to make a movement a COSC-certified Chronometer?

Ever since our story on the inner workings of COSC here, via an in-depth article by The Naked Watchmaker, our thirst for horological knowledge remain. More specifically, what it takes to make a movement a COSC-certified Chronometer? And what is the intrinsic value of the certification?  We caught up with Peter Speake the co-founder of … ContinuedThe post The Naked Watchmaker explains what it takes to make a movement a COSC-certified Chronometer? appeared first on Time+Tide Watches.

MICRO MONDAYS: The Brellum Pilot Power Gauge Chronometer – a COSC-certified classic pilot’s chronograph with a modern edge

Brellum has just released a resolutely modern, yet classic take on a pilot’s chronograph, with the sharpest of details – and shows how much colour and texture transforms the aviator personality of the Brellum Pilot Power Gauge Chronometer. This is another strong reference from Brellum that will follow your lead, be it battle-ready flight instrument … ContinuedThe post MICRO MONDAYS: The Brellum Pilot Power Gauge Chronometer – a COSC-certified classic pilot’s chronograph with a modern edge appeared first on Time+Tide Watches.

The COSC Introduces the New Excellence Chronometer Certification

The Contrôle Officiel Suisse des Chronomètres (COSC, the body responsible for certifying watch movements as Swiss chronometers) has just announced a new chronometry standard that will be rolled out over the course of 2026. The news comes at a time when the COSC has some competition for timekeeping certifications, most notably the METAS certification (which first requires a watch movement to be COSC certified) used by Omega and Tudor, as well as other certifications provided by the brands themselves.  The new COSC certification is being framed as an additional level of certification that will accompany the familiar “Certified Chronometer” tag that is seen on the dials and paperwork of millions (literally) of watches that have been put through the COSC paces over the years. The new “Excellence Chronomenter” certification provides an additional layer of guarantee of reliability that goes beyond simple accuracy. As a refresher, COSC certification certifies the movement is working at an optimal level, not a fully cased watch. To achieve a Certified Chronometer certification, a movement must show average accuracy of -4 to +6 seconds per day over a 15 day period, tested across 5 positions and 3 temperatures.  The Excellence Chronometer certification tightens the accuracy threshold from a spread of 10 seconds in total to 6 (-2 to +4 seconds per day). It also adds metrics for magnetic resistance and power reserve verification in fully cased watches. According to the COS...

Industry News – The COSC Releases Excellence Chronometer, its New, Stricter Standard in Chronometry

What is a chronometer…? In short, it is a watch that has been officially tested for its precision. And to guarantee the precision of watches, several tools exist, such as the ISO 3159 standard (which celebrates its 50th anniversary this year) and official organisations, such as the Observatoire de Besançon in France, the Glashütte Observatory […]

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.

Owner's Review: The Serica 5303-3 COSC Diving Chronometer Is Parisian

Picture the scene: a hectic work week ends with a quick bite at your favorite Italian trattoria, then you hustle a few blocks afterwards to a dimly lit West Village jazz club to catch a blazing first set from the house band. Glancing down at your wrist, you see you have just enough time to cab it to the airport for the redeye to Paris for a well-deserved long weekend, beachfront on the Côte d'Azur. But the watch on your wrist isn’t a vintage Rolex GMT-Master or Omega Seamaster 300, although either would be a fine choice to segue from the office to the French Riviera without missing a beat. No, your timepiece is from Serica, a microbrand based in France with enough Continental cool and midcentury charm to appear as if it just popped out of a time capsule from 1962. If ever a modern sports watch evoked the Mad Men era, this is it. Even though it’s only been in existence since 2019, Serica doesn't feel like a typical microbrand. In fact, it has the aura of an established horological icon, one with its own storied history and visual language. And if it’s not readily apparent, I’m positively obsessed with the entire Serica aesthetic.  Serica's French-designed, Swiss-made creations blend the refinement of classic Parisian fashion with the urbane cool of a European matinee idol. The company’s debut release was the W.W.W field watch, followed by the 5303 diver that made its bow in 2021, in both black and white-dialed variants. A new colorway was offered the followin...

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...

Sunday Morning Showdown: Jaeger-LeCoultre Master Control Chronometre Perpetual Calendar Vs. IWC Ingenieur Perpetual Calendar 41

Another week, another Sunday Morning Showdown. We hope you are enjoying some well-deserved time off and a good weekend breakfast. Lean back in your chair, folks, because we have a proper heavyweight bout scheduled for you! This week, we pit two stainless steel perpetual calendars with integrated bracelets and blue dials against each other. Thomas […] Visit Sunday Morning Showdown: Jaeger-LeCoultre Master Control Chronometre Perpetual Calendar Vs. IWC Ingenieur Perpetual Calendar 41 to read the full article.

Hands-on – The New Jaeger-LeCoultre Master Control Chronometre Collection

Back for a second tenure at Jaeger-LeCoultre, Jérôme Lambert’s 2025 return as CEO has brought fresh momentum to the brand. While spectacularly complex models like the Master Hybris Inventiva Gyrotourbillon a Stratosphere might eclipse the limelight at Watches & Wonders this year, there is a second release that deserves attention: the new Master Control Chronometre collection. […]

Introducing: The Jaeger-LeCoultre Master Control Chronometre Collection

Jaeger‑LeCoultre reshapes the Master Control line with three new Chronometre models in two materials. The collection takes inspiration from the integrated case and bracelet first seen on the Master Mariner Chronomètre in 1973. This time, the execution feels thoroughly modern and far more refined. The lineup includes the 38mm time-and-date model, a 39mm version with […] Visit Introducing: The Jaeger-LeCoultre Master Control Chronometre Collection to read the full article.

Patek Philippe acquires Beyer Chronometrie, Philipps introduces watch insurance, and the Horological Society of New York commits over $1.6M to watchmaking

This week, Patek Philippe acquires Beyer, Philipps introduces insurance, and the Horological Society of New York Gala raises over $1.6MThe post Patek Philippe acquires Beyer Chronometrie, Philipps introduces watch insurance, and the Horological Society of New York commits over $1.6M to watchmaking appeared first on Time+Tide Watches.

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