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Results for Chronometer (COSC)

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Chronometer (COSC)

The Swiss accuracy certification at -4/+6 s/day across 15 days.

First Look - The World’s Thinnest Mechanical Watch, the New 1.70mm Bulgari Octo Finissimo Ultra COSC (incl. video) Monochrome
Bulgari Octo Finissimo Ultra COSC Apr 8, 2024

First Look - The World’s Thinnest Mechanical Watch, the New 1.70mm Bulgari Octo Finissimo Ultra COSC (incl. video)

The competition for ultra-thin watches is more intense than ever. Watches with a thinness that would have been unimaginable a few years ago have recently been unveiled, with manufacturers squeezing complications into minimal space and tirelessly chasing microns. Bulgari’s Octo Finissimo saga has garnered widespread recognition in this realm. The brand’s remarkable series of records […]

Introducing - New Dial Colours for the Frederique Constant Highlife Automatic COSC 39mm Monochrome
Frederique Constant Highlife Automatic COSC 39mm Dec 22, 2023

Introducing - New Dial Colours for the Frederique Constant Highlife Automatic COSC 39mm

It’s pretty surprising when you think that the Highlife collection, Frederique Constant’s take on the luxury sports watch, has been around for fewer than three years. Thanks to its well-designed and finished case, its integrated and interchangeable bracelet, its clean dial, its well-represented range of complications, its affordable price tag, and the fact that it […]

Tool/Kit: Road-tripping France with the Serica 8315 GMT Chronometer Worn & Wound
Serica 8315 GMT Chronometer Ten Jun 29, 2023

Tool/Kit: Road-tripping France with the Serica 8315 GMT Chronometer

Ten years ago, my wife and her sisters planned a trip to Paris for her mom’s 60th birthday. To prepare for that trip she signed up for French lessons with a couple from the Western Alps temporarily living in the States. We became fast friends. Finally, 10 years later, it was my turn to head not only to the City of Lights, but this time, to visit our friends in the mountains of France as well. Earlier this year, I was catching up with my friends Gabriel Vachette and Jérôme Burgert, the co-founders of Serica Watches, based in Paris. Serica is a relatively new watch brand, but they’ve managed to quickly establish themselves as an enthusiast favorite by creating clean, badgeless, modern watches that nod to vintage references, yet they also have a design language that’s all their own. I, of course, let them know of my pending visit to Paris and the roadtrip that would follow. I was thrilled to learn they’d be opening a new boutique right around the time when I’d be in town. The wheels instantly started cranking. I felt it’d make for a fun edition of Tool/Kit and they quickly agreed to lend me a model that I could pick up at the boutique toward the beginning of our excursion. I knew that they’d just released a CSOC version of their popular 5303 diver, so I naturally assumed that’s what they’d want to feature. But Gabriel, insightfully suggested, “You are traveling, you need a traveler’s watch.” He picked up their 8315 GMT Chronometer released at the Wi...

TAG Heuer Autavia Chronometer Flyback Hands-on Review WatchAdvice
TAG Heuer Autavia Chronometer Flyback Hands-on Apr 25, 2022

TAG Heuer Autavia Chronometer Flyback Hands-on Review

The Watch That Changed My Mind On TAG! What we love: Comfortable and easy to wear, light for its size and specsBang for buck in finish, movement and specsGood looking design with vintage ques What we don’t love: Wears on the larger size for a 42mm mainly due to its heightNoisy movement and winding rotor (some may like this though)Some wearers may find the dial harder to read at a glance with the lack of contrast in the numerals Overall rating: 8/10 Value for money: 7.5/10 Wearability: 7.5 / 10 Design: 8.5/10 Build quality: 8.5/10 Tag Heuer has always been one of those brands that never grabbed my attention. I always saw it as a watch brand that was a little overpriced, and like a lot of brands, you’re paying for more marketing than the watch itself. Now, I have owned a Tag Heuer Carrera Heuer01 in the past, so I’m not adverse to TAG at all, but it has since moved on to make way for others in my collection. So when I had the opportunity to get my hands on the new 60th Anniversary limited edition Autavia Flyback Chronograph, I was looking forward to road testing the latest iteration of the distinguished Autavia line. A Short History Lesson Before we go any further, let’s take a step back and in case you’re not familiar with the Autavia model and its history, here’s a quick refresh. The Autavia wristwatch collection, the first product launched under the leadership of Jack Heuer 60 years ago, got its name from two pillars of TAG Heuer’s history: Automobile and Av...

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.

New releases from Grand Seiko, Garrick, Tissot, Bulova and more Time+Tide
Glashütte Original Senator Chronometer … ContinuedThe Aug 19, 2023

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? Time+Tide
Mar 29, 2021

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 Time+Tide
Nov 1, 2020

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 Worn & Wound
Tudor as well as other Feb 12, 2026

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 Monochrome
Feb 12, 2026

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 Monochrome
Omega s Laboratoire de Précision May 17, 2024

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 […]