Watch brandsWatch wikiWatch videosVariousWatch calendarSaved articles
PopularRolexOmegaPatek PhilippeAudemars PiguetTudorGrand SeikoCartierSeikoIWCTAG HeuerBreitlingJaeger-LeCoultreA. Lange & SohneZenith

Results for Chronometer (COSC)

489 articles · 4 videos found · page 11 of 17

Related pages

Wiki · Guide
Chronometer (COSC)

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

First Look - The New Platinum Editions of the Ferdinand Berthoud Chronomètre FB3 SPC Monochrome
Chopard s co-president Karl-Friedrich Scheufele Mar 28, 2025

First Look - The New Platinum Editions of the Ferdinand Berthoud Chronomètre FB3 SPC

In 2015, one of the great names in 18th-century watchmaking was resurrected by Chopard’s co-president Karl-Friedrich Scheufele. Ferdinand Berthoud (1727-1807), the Swiss horologist who emigrated to Paris in 1745 and gained fame for his marine chronometers, was granted a second lease of life. Determined to perpetuate the legacy and chronometric credentials of F. Berthoud’s past […]

The Titanium Treatment: Introducing The Doxa Sub 300 Ti5 Clive Cussler Fratello
Doxa Sub 300 Ti5 Clive Jul 15, 2026

The Titanium Treatment: Introducing The Doxa Sub 300 Ti5 Clive Cussler

Doxa is marking what would have been Clive Cussler’s 95th birthday with a new take on its most emblematic dive watch. The Doxa Sub 300 Ti5 Clive Cussler keeps the shape of the 1967 Sub 300 but features a case, crown, case back, and even the dial crafted from Grade 5 titanium. This COSC-certified chronometer […] Visit The Titanium Treatment: Introducing The Doxa Sub 300 Ti5 Clive Cussler to read the full article.

Why I Bought It: The Zenith Chronomaster Tribute to Charles Vermot - Reprise Quill & Pad
Zenith Chronomaster Tribute Jan 13, 2024

Why I Bought It: The Zenith Chronomaster Tribute to Charles Vermot - Reprise

Quentin R. Bufogle could go on and on about the Zenith Chronomaster Tribute to Charles Vermot’s stunningly beautiful, metallic blue dial, silicon escapement (visible via the open heart feature), COSC chronometer certification and that it’s one of the last truly great Chronomasters, but that would be missing the point, i.e. how Charles Vermot saved Zenith.

Omega ousts Rolex with brand new technology that promises 0/+2 second accuracy a day Time+Tide
Omega ousts Rolex Jan 26, 2023

Omega ousts Rolex with brand new technology that promises 0/+2 second accuracy a day

New Spirate™ System debuts new hairspring with ultra-fine 0/+2 regulation capability. The system debuts in new Speedmaster Super Racing watch. Its usage beyond the Super Racing is planned, but consumers will need to wait for new calibres – not just new watches. COSC, METAS, Superlative, and more. There are various chronometer certifications within the industry today, with each, … ContinuedThe post Omega ousts Rolex with brand new technology that promises 0/+2 second accuracy a day appeared first on Time+Tide Watches.

Earth just broke the record for the shortest recorded day in modern history. What does this mean? Time+Tide
Aug 9, 2022

Earth just broke the record for the shortest recorded day in modern history. What does this mean?

Watch lovers are obsessed with accurate timekeeping, and brands always look to standout with various certifications – whether COSC, METAS or Superlative Chronometer standards among others. Every time I set my watch, I always sync it – to the second – to my Watchville app clock, which effectively displays my iPhone’s highly synchronised time based … ContinuedThe post Earth just broke the record for the shortest recorded day in modern history. What does this mean? appeared first on Time+Tide Watches.

Swatch Introduces the Big Bold Jelly SJX Watches
Swatch Dec 27, 2019

Swatch Introduces the Big Bold Jelly

One of the iconic Swatch watches from its 1980s heyday was the Jelly Fish (ref. GZ010), which was unveiled in 1983, the same year Swatch itself was launched. A quartz movement entirely exposed in a clear plastic case – accented with brightly coloured hands – the Jelly Fish was a bestseller that encapsulated what Swatch was all about: no-frills but fun watchmaking. The Jelly Fish remained in production, in one form or another – there was even a COSC-certified chronometer limited edition (GK124) in 1990 – for over two decades. Now the spirit of the Jelly Fish returns as the Big Bold Jelly, essentially the same idea but in a larger watch case. The Big Bold Jelly features a quartz movement inside a Big Bold case, just like the recent limited editions created in collaboration with fashion label A Bathing Ape (BAPE). The case is a large 47mm in diameter, with the crown unusually positioned at two o’clock. But just as with the original Jelly Fish, the case is clear plastic, while the band is translucent silicone. And the hands are rendered in bright colours – red, yellow and blue – with a bit more colour provided by the gilded wheels within the movement. Key facts and price Big Bold Jelly Ref. SO27E100 Diameter: 47mm Height: 11.75mm Material: Clear plastic Water resistance: 30m Movement: Quartz Functions: Hours, minutes, and seconds Strap: Silicone with aluminium pin buckle Availability: At Swatch stores Price: US$110 For more information, visit Swatch.co...

Testing A Master: Omega And Swiss Federal Institute Of Metrology Announce New Certification Process Revolution
Omega Dec 11, 2014

Testing A Master: Omega And Swiss Federal Institute Of Metrology Announce New Certification Process

A Swiss watch is great, but a Swiss Chronometer is even better; for many customers there is added appeal in a COSC-certified watch. No surprise that some of the largest Manufactures in Switzerland, also have incorporated the Chronometer certification for the majority of their collections. Omega thought it was time to step up the certification […]

Introducing: The Three-Watch-Strong Lebois & Co Heritage Small Seconds Collection Fratello
Oct 30, 2025

Introducing: The Three-Watch-Strong Lebois & Co Heritage Small Seconds Collection

After a series of chronographs, the Dutch-based brand Lebois & Co returns with a trio of three-handers. Please welcome the Heritage Small Seconds collection. The silver Script, blue Baton, and black Numeral Founder’s Launch editions are COSC-certified chronometers with perks for early adopters. A “Chronomètre Lebois & Co” sweater inspired by Parisian streetwear is waiting […] Visit Introducing: The Three-Watch-Strong Lebois & Co Heritage Small Seconds Collection to read the full article.

Behind the DIN 8330 Standard for Pilot’s Watches Worn & Wound
Sinn lead Oct 3, 2025

Behind the DIN 8330 Standard for Pilot’s Watches

Standards and certifications in watchmaking were primarily developed for chronometry, as well as to reassure the buyer that their watch had been thoroughly tested to a certain level of accuracy. The standards we see most often in the technical specifications are COSC, METAS, and other company or regional chronometry certifications. In modern watchmaking, other key standards like the ISO 6425 dive watch standard, which was developed in the 1990s and followed by watch companies, also come into play. These standards were largely based on various military set standards for watches; however, since each military set their own requirements, there was not one universally followed standard. The International Organization for Standardization (ISO) published specific requirements and testing procedures for a watch to be officially designated a “Diver’s watch”. While there is no ISO standard for pilot’s watches, there are specific requirements set by militaries around the world. One of the most well-known standards is from the WWII German pilot’s watch known as the “Beobachtungsuhren” or “B-Uhren.” B-Uhren pilot’s watch standards are well documented and are still followed by many watch companies to this day. In March 2012, Sinn lead an initiative in collaboration with the Faculty of Aerospace Technology at the Aachen University of Applied Sciences to create TESTAF – Technical Standard for Pilot Watches. TESTAF was developed so that a pilot’s watch meets all mod...

How marine chronometers shaped horology today Time+Tide
Sep 5, 2023

How marine chronometers shaped horology today

Navigation is definitely taken for granted these days. Not that I don’t personally rely on Google Maps to take me pretty much everywhere, but the art of traversing the globe was one of the most difficult, frightening, and often heroic skills for thousands of years in human history. As if finding your way through icy … ContinuedThe post How marine chronometers shaped horology today appeared first on Time+Tide Watches.

The Observatory Chronometers that Timed the Tour de France SJX Watches
Longines split-seconds stop watches – Aug 12, 2019

The Observatory Chronometers that Timed the Tour de France

Watches once owned by prominent personalities are captivating. Paul Newman’s “Paul Newman” Daytona, the Rolex “Bao Dai”, Buzz Aldrin’s Speedmaster Moonwatch, the Henry Graves Supercomplication, and even J. Pierpont Morgan’s lost pocket watch, are amongst most sought after timepieces in the world. In fact, a good number of the most expensive watches ever sold at auction have notable provenance, which turns a mere watch into a historical artefact. Probably the most important timekeepers in cycling, these are a pair of Longines split-seconds stop watches – refs. 7411 and 8350 respectively – that were used by Jean Pitallier, the former president of the French Cycling Federation, to time the Tour de France in the fading glory days of mechanical sports timing, just before quartz stopwatches took over. In fact, the pair of stopwatches are not merely chronographs, but also observatory certified chronometers. Watchmaking once represented the cutting edge research of mechanical engineering. Observatory time trials at Neuchatel, Geneva or Kew were rigorous scientific affairs, with movements Peseux 260 and Zenith 135 competing to be the most accurate movement in the world. But such movements were three-hand, time-only. Aside from tourbillon movements, very few complicated calibres were submitted to timing contests. Mr Pitallier’s pair of Longines were both certified by the Neuchatel observatory. The swan song of competitive timekeeping In modern day watch collectin...

First Look - Time Set to the Second on the New Arnold & Son DSTB Stop-Seconds Monochrome
Arnold & Son DSTB Stop-Seconds Arnold & 4 days ago

First Look - Time Set to the Second on the New Arnold & Son DSTB Stop-Seconds

Arnold & Son has forged its identity around the legacy of the 18th-century English chronometer maker John Arnold. Its collections are grouped into three categories (astronomy, chronometry and world time), each reflecting a different dimension of his work. One of the brand’s signature complications is the true seconds, also known as a deadbeat seconds mechanism. […]

Hands-on - The Updated Breguet Marine 5517, Navigating a More Classical Course Monochrome
Breguet Marine 5517 Navigating Oct 12, 2026

Hands-on - The Updated Breguet Marine 5517, Navigating a More Classical Course

Breguet’s maritime pedigree dates to 1815, when Louis XVIII appointed Abraham-Louis Breguet as watchmaker to the French Royal Navy. Although Breguet did not invent the marine chronometer (that was John Harrison), he improved its robustness and precision, enabling sailors to calculate longitude at sea more accurately. It wasn’t until 1990, though, that the brand tapped […]

The Formex Aria Proves The Phrase “Don’t Knock It ‘Til You Try It” Fratello
Formex Aria Proves Sep 16, 2026

The Formex Aria Proves The Phrase “Don’t Knock It ‘Til You Try It”

Without a doubt, one of the most talked-about recent releases is the Formex Aria Manufacture Chronometer, or simply Aria, as most people will refer to it. After I wrote the introductory article based on the press info, I was curious to learn more. While the design didn’t necessarily make me swoon, I know Formex well […] Visit The Formex Aria Proves The Phrase “Don’t Knock It ‘Til You Try It” to read the full article.

Hands On: Chopard L.U.C 1963 Heritage Regulator SJX Watches
Patek Philippe Sep 11, 2026

Hands On: Chopard L.U.C 1963 Heritage Regulator

One of the most appealing releases of Geneva Watch Days was the Chopard L.U.C 1963 Heritage Regulator. While not an altogether new model, the watch incorporates a number of welcome updates, including a smaller case and a more refined dial that resembles an instrument panel on the wrist. The L.U.C 98.02-L movement remains in service, and is both COSC and Poinçon de Genève-certified. Moreover, the calibre achieves an impressive nine days of power reserve and is neatly finished, as is typical for Chopard’s higher-end offerings. Initial thoughts Chopard has long been a steward of the regulator format. In fact, the 1963 Heritage Regulator marks 20 years since the brand’s first contemporary regulator wristwatch. The regulator format is strongly associated with precision clocks, but Chopard’s interpretation reminds me of an automotive dashboard — perhaps intentionally, since the brand’s co-president Karl-Friedrich Scheufele is known for his affinity for vintage cars. The latest example is substantially improved over prior generations, with several nips and tucks that result in a move wearable and less busy package overall. The watch is tangibly well made, with an expensive bill of materials and refined execution. The 1963 Heritage Regulator is priced at about US$50,000, and is limited to a concise run of 25 pieces in (ethically sourced) 18k white gold. By current standards, it’s a reasonable proposition, but still slightly above the going rate for a Patek Philippe...

The Tudor Northflag Returns Sharper and Stronger SJX Watches
Tudor Northflag Returns Sharper Sep 1, 2026

The Tudor Northflag Returns Sharper and Stronger

A decade after it first debuted, Tudor has revived the Northflag. Originally a 1970s-inspired sports watch to showcase Tudor’s first-ever in-house movement, the Northflag has been upgraded inside and out. The rebooted Northflag gains a GMT function plus refinements all round, ranging from superior detailing on the case to lume blocks on the dial. And the movement is now a Master Chronometer, while the price stays true to Tudor’s value-oriented focus at just over US$5,500. Initial thoughts The original North Flag was a bit quirky with its power reserve indicator, and also probably ahead of its time; a Tudor with an in-house movement seemed like an odd concept back then. I liked it then, but the North Flag wasn’t a commercial success, so it is surprising that Tudor has revived the model. But the new Northflag is an immediately appealing watch, reflecting Tudor’s advancements in design, manufacturing, and branding. In fact, the Northflag is one of the most interesting watches in the current Tudor catalogue, alongside the equally recent Monarch. Although practically everything Tudor makes is well priced and an easy recommendation, almost all of Tudor’s best watches are variations of the Oyster case and Black Bay diver. The Northflag, on the other hand, is something else entirely. The angular, 1970s-style case is different, as is the dial. But all the elements are harmonious, and the design works. This is one of my strongest recommendations in the Tudor line-up today,...