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Results for COSC

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Chronometer (COSC)

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

First Look – The New Formex Essence Space Ghost 41mm Automatic COSC Monochrome
Formex Essence Space Ghost 41mm Aug 14, 2025

First Look – The New Formex Essence Space Ghost 41mm Automatic COSC

Formex’s Essence line, introduced in 2018, quickly earned respect as the brand’s versatile, go-anywhere sports watch, combining sharp case architecture, great engineering, and chronometer-certified accuracy. In 2020, the collection took on a cosmic turn with the debut of the Space Rock editions, featuring dials cut from the ancient Muonionalusta meteorite. Over time, these rare cosmic […]

Owner's Review: The Serica 5303-3 COSC Diving Chronometer Is Parisian Teddy Baldassarre
Serica Oct 4, 2024

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...

Introducing – The new Formex Reef 39.5mm Bahama Blue Automatic COSC Monochrome
Formex Reef 39.5mm Bahama Blue Jun 11, 2024

Introducing – The new Formex Reef 39.5mm Bahama Blue Automatic COSC

The “Baby Reef” series of Formex 39.5mm dive watches, comprised of four watches distinguished by dial colour, was presented at the end of 2023. Now, in time for summer, it gets a new and very fresh-looking reference. It’s everything the brand enthusiasts appreciate about the collection, only brighter. Here’s the Reef 39.5mm Bahama Blue 300m […]

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 […]

Introducing – By Popular Demand, The Smaller Formex “Baby Reef” 39.5mm Automatic COSC 300M Monochrome
Formex Baby Reef” 39.5mm Automatic Dec 7, 2023

Introducing – By Popular Demand, The Smaller Formex “Baby Reef” 39.5mm Automatic COSC 300M

When released in 2020, the 42mm Formex Reef Automatic Chronometer 300M impressed enthusiasts, demonstrating a fusion of innovation and design sophistication in a highly functional tool watch. Fresh and unique, the watch offered a compelling array of features and extensive customization options. Today, just like it did with the Essence collection a few years ago, […]

Exclusive: TAG Heuer To Introduce A COSC Certified Flying Tourbillon Chronograph For Under 20,000CHF (14,900CHF !!!) Revolution
TAG Heuer Mar 22, 2015

Exclusive: TAG Heuer To Introduce A COSC Certified Flying Tourbillon Chronograph For Under 20,000CHF (14,900CHF !!!)

Today, recently appointed General Manager of TAG Heuer, Guy Semon dropped a bombshell on the Revolution team with news of an upcoming watch that certainly is a provocative statement of intent. We at Revolution love our watches, and the passing parade of the best that the Swiss watch industry has to offer is by no means something […]

Introducing: The Tudor Black Bay Chrono “Carbon 26” Hodinkee
Tudor Black Bay Chrono “Carbon 5 days ago

Introducing: The Tudor Black Bay Chrono “Carbon 26”

What We Know Ahead of this weekend's Miami Grand Prix, Tudor has announced the Black Bay Chrono "Carbon 26," a follow-up to last year's Carbon 25. While Tudor's ties to motorsport date back to the late 1960s with the Tudor Watches Racing Team, its current partnership with the Visa Cash App Racing Bulls team began in 2024, and they have been quick to make the most of it, with two limited editions in two consecutive seasons. The Carbon 25 marked the first limited-edition release from that relationship, with the Carbon 26 continuing the same approach in 2026. At its core, the update centers on a revised color scheme reflecting the livery of the VCARB 03 car. The watch retains a 42mm carbon fiber case with a fixed tachymeter bezel, along with a titanium caseback, crown, and pushers with a black PVD finish. The dial remains "racing white," now with yellow accents and carbon fiber subdials. The carbon fiber case, introduced last year, carries over unchanged. It replaces the steel case used in standard Black Bay Chronographs, while keeping the same 42mm diameter, fixed tachymeter bezel, screw-down crown, chronograph pushers, and overall case profile. Inside is the Manufacture Chronograph Calibre MT5813, an automatic chronograph with a column wheel, vertical clutch, silicon balance spring, and a 70-hour power reserve. It is COSC-certified, and it also meets Tudor's more rigorous standards of -2/+4 seconds per day. The Black Bay Chrono "Carbon 26" is priced at $8,625, produced in a...

Introducing: The New Chopard L.U.C. Chopard Strike One In Titanium (Live Pics) Hodinkee
Chopard L.U.C Chopard Strike One Apr 20, 2026

Introducing: The New Chopard L.U.C. Chopard Strike One In Titanium (Live Pics)

What We Know Among the more attractive releases from Watches and Wonders this year is the new Chopard L.U.C. Strike One Titanium, now with a beautiful new dial treatment. In ethical 18k rose gold with salmon-colored galvanic treatment, with a hand-guilloché central medallion with a honeycomb motif, the Strike One is a watch that may fly under the radar for some. Not a minute repeater, not a grande et petite sonnerie, but rather a beautiful watch that chimes once at the top of the hour (a sonnerie au passage), it's still got a very romantic quality about it. Despite being a chiming watch, Chopard has (as they usually do) minimized the size as much as possible with a 40mm by 9.86mm case in Grade 5 titanium. That light metal should help emphasize the chime's sound, with the hammer on the dial side visible through an aperture for the full experience. Even better, the gong is made of sapphire and is connected in a monobloc construction (one piece) to the dial crystal to emphasize sound transmission. The dial itself is capped by a snail-shaped chapter ring and has rhodium-plated hour markers and hands, plus anthracite-colored printed transfers. This is all powered by the L.U.C. 96.32-L. With a two-barrel construction and micro-rotor, you get 65 hours of power reserve, automatic winding, and a 4Hz beat rate, all chronometer-certified by COSC, with Poinçon de Genève-certified quality. Chopard really shows bigger brands how to do it when it comes to finishing, so this is the kin...

Watches & Wonders: The Chopard L.U.C. 1860 Chronometer, Like the Original from Three Decades Past, May be Worth The Wait Worn & Wound
Chopard L.U.C 1860 Chronometer Like Apr 14, 2026

Watches & Wonders: The Chopard L.U.C. 1860 Chronometer, Like the Original from Three Decades Past, May be Worth The Wait

Louis-Ulysse Chopard founded his eponymous watch company in 1860, but it took over 100 years for the brand to truly come into its own. In 1996, and after three years of development, the company debuted its own in-house movement. The wait seemed to have been worth it. The L.U.C 96.01-L immediately drew acclaim for beautiful finishing, embracing the microrotor, and COSC certification. It, and the subsequent L.U.C. 1860 dress watch, marked a sea change from reliance on third parties to true independence, arriving at a resurgence in fine mechanical watchmaking. Thirty years later, the L.U.C. family has expanded into dozens of variants, complications, and movements. But at 2026’s Watches & Wonders, Chopard pays tribute to 30 years of in-house manufacturing with a continuation of that vaunted original. The L.U.C 1860 Chronometer uses the same dial and microrotor movement from 1996, albeit with their own upgrades and unique design tweaks.  The intricate white-gold dial features guilloché finishing in the center, emanating in scalloped waves from the Chopard logo and nameplate. The concentric circles are separated by thin bands of white gold, and delicate spear-shaped markers point inward, toward the dauphine hands. At 6 o’clock, the small-seconds dial echoes the twin-circle pattern of the overall dial, and Chopard specifically mentions the lack of a date window “to preserve purity.”  Where the first L.U.C. 1860 had a white dial with gold accents, this Chronometer wears...

Watches & Wonders: Tudor Introduces the Black Bay 54 Blue Worn & Wound
Tudor Introduces Apr 14, 2026

Watches & Wonders: Tudor Introduces the Black Bay 54 Blue

Tudor continues to expand their Black Bay 54 collection at this year’s Watches & Wonders with the Black Bay 54 “Blue”. Since the launch of the original Black Bay 54, the diver has settled into a role as a favorite among enthusiasts for its slender, compact proportions. The original release was a straightforward black dialed, black bezel affair, and last summer saw the surprise launch of the “Lagoon Blue” reference that re-characterized the watch as a fun, more jewelry oriented diver than we would have expected. A diver with a blue dial and bezel is frankly something expected in a dive watch lineup these days, so this release is not so much a surprise, but it’s interesting to see how Tudor executes on a dive watch standard.  In terms of specs, there are no big surprises here, and this edition of the 54 follows those that have come before. The case in stainless steel measures 37mm in diameter and has water resistance to 200 meters. It runs on the same MT5400 movement, which is COSC-certified and has a silicon balance spring and 70-hour power reserve. It’s available on both a rivet style three link bracelet or a rubber strap.  The blue dial is very, very blue. Tudor refers to it as “sapphire blue” and in the bright lights of their booth at Palexpo the sunray finishing and almost purple-ish hues are quite prominent on the dial. It’s very saturated, and I think even in less intense lighting it will have a lot of presence. If you compare it to other blue wa...

A Legend is Born: Squale Just Dropped a New 37mm Diver Worn & Wound
Squale Mar 19, 2026

A Legend is Born: Squale Just Dropped a New 37mm Diver

If you have been following us for a while, you are likely well versed in Squale’s divers, vintage-inspired designs, and limited edition runs. The brand has quietly been a leader in the realm of dive watches since the 60s with a cult following from hardcore dive watch nerds. In the past decade in particular, Squale has been getting more and more traction and recognition. In 2019, the brand notched its 60th anniversary and with that, introduced a new collection: the Sub-39. This limited edition fittingly paid homage to Squale’s early 1960s divers, using an original prototype with a 39mm case as reference. Following its success, the brand ultimately made the Sub-30 a permanent collection, upping the ante with COSC-certification and complications like a GMT. Today, we get the next evolution with the Sub-37 Legend. Focusing on the brand’s core tenants – proportions, function, and character – the new slightly sized down 37mm diver emphasizes form over function in a way that is faithful to the golden age of diving, an era when watches were designed to perform rather than to impress. Beginning with the dial, you have a fairly quintessential execution in matte black with a sapphire glass-box crystal reminiscent of vintage plexiglass while ensuring durability and optimal dial legibility. Visibility remains at the forefront of this utilitarian design with both the dial and hands treated with SuperLumiNova Old Radium. Framing the dial is a clean, highly readable unidirection...

Hands On: Christopher Ward C63 Sealander True GMT SJX Watches
Christopher Ward C63 Sealander True GMT Mar 19, 2026

Hands On: Christopher Ward C63 Sealander True GMT

The Christopher Ward C63 Sealander True GMT fills a conspicuous gap in the brand’s catalogue with a proper ‘flyer’ GMT, complete with an independently adjustable local-time hour hand. A handsome, expensive-looking dial conceals the new CW-002 movement, which is COSC-certified and offers a five-day power reserve - a rare pairing. While collectors have noticed that Christopher Ward’s pricing has risen steadily in recent years, the True GMT makes a compelling case that the technical substance has kept pace. The journeyman brand Christopher Ward (CW) is a brand that is evolving unusually rapidly, and seems to have been in a state of almost constant transformation since it was founded in 2004. The brand has cycled through a number of different logos in a fairly short period of time, which has confused collectors. The product mix has also shifted, reflecting more upmarket ambitions that have priced out fans of the brand’s early budget products. This instability has turned off some collectors, which is understandable - most luxury brands are fairly conservative, in part to emphasise the long-lasting social capital that comes with a purchase. That said, CW seems to have finally found an identity worth sticking to. The new logo, which combines England’s St. George’s Cross and the white cross of the Swiss flag, is simple and appealing, and concisely communicates the English/Swiss origin. And while it’s true that prices have crept up, the brand has increased innov...