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

Results for Chronometer (COSC)

683 articles · 123 videos found · page 25 of 27

Related pages

Wiki · Guide
Chronometer (COSC)

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

BREAKING: Introducing the OMEGA Speedmaster Apollo 11 50th Anniversary Limited Edition Revolution
Omega Speedmaster Apollo 11 50th Mar 12, 2019

BREAKING: Introducing the OMEGA Speedmaster Apollo 11 50th Anniversary Limited Edition

Omega commemorates 50 years of the Moon landing by releasing a very special Speedmaster that’s reminiscent of the 1969 Tribute to Apollo XI timepiece. This new edition is presented in their own 18k Moonshine gold, with a new Master Chronometer in-house Caliber 3861. Revolution founder Wei Koh speaks exclusively with Omega CEO Raynald Aeschlimann on this important timepiece.

INTRODUCING: The three amigos – Zenith’s Defy Zero G dons Mexican affair Time+Tide
Zenith s Defy Zero G Oct 16, 2018

INTRODUCING: The three amigos – Zenith’s Defy Zero G dons Mexican affair

Around these horological parts, we really love a good four-letter acronym – SIHH, GPHG, COSC … I think you get the idea. In fact, have a conversation with any random watch enthusiast, and chances are that at least one of these terms will come up. However, one that we don’t hear a lot about on … ContinuedThe post INTRODUCING: The three amigos – Zenith’s Defy Zero G dons Mexican affair appeared first on Time+Tide Watches.

EDITOR’S PICK: Can TAG Heuer’s affordable tourbillon match it with the big dogs? Time+Tide
TAG Heuer s affordable tourbillon match Oct 8, 2018

EDITOR’S PICK: Can TAG Heuer’s affordable tourbillon match it with the big dogs?

Editor’s note: An affordable Swiss-made tourbillon. Words like that were once considered something of an oxymoron. That all changed, however, when in 2016, TAG Heuer’s Carrera Heuer-02T came along, causing something of a stir amongst the watchmaking elite. Well, with this year’s release of the chronometer grade TAG Heuer Carrera Chronograph Tourbillon Tête de Vipère, those shock … ContinuedThe post EDITOR’S PICK: Can TAG Heuer’s affordable tourbillon match it with the big dogs? appeared first on Time+Tide Watches.

HANDS-ON: The Longines Record – going for gold Time+Tide
Longines Record – going Apr 23, 2018

HANDS-ON: The Longines Record – going for gold

Last year, Longines doubled down with the release of the Record collection. Illustrating just how serious they are about creating classically handsome and highly accurate watches, with price tags that won’t break the bank. The result was their first ever COSC-certified collection that combined a variety of dial options and colours, with four different sizes … ContinuedThe post HANDS-ON: The Longines Record – going for gold appeared first on Time+Tide Watches.

VIDEO: Get ready for summer with the new Omega Aqua Terra on rubber Time+Tide
Omega Aqua Terra Oct 2, 2017

VIDEO: Get ready for summer with the new Omega Aqua Terra on rubber

I didn’t appreciate just how good the new Master Chronometer Omega Aqua Terras were until I spent some proper time with them. And now that I have, I’m kicking myself for not talking more about them at and after Basel. What’s not to like? The design manages to be current and sporty without losing sight … ContinuedThe post VIDEO: Get ready for summer with the new Omega Aqua Terra on rubber appeared first on Time+Tide Watches.

INTRODUCING: The IWC Portugieser Chronograph Classic lives up to its name Time+Tide
IWC Portugieser Chronograph Classic lives May 18, 2017

INTRODUCING: The IWC Portugieser Chronograph Classic lives up to its name

In 1939 when two Portuguese merchants approached IWC about making a wristwatch with the same levels of accuracy usually seen in marine chronometer pocket watches, they had no idea it would be the beginning of a legend and the birth of one of IWC’s most popular collections. With a new slightly revised design, IWC have launched … ContinuedThe post INTRODUCING: The IWC Portugieser Chronograph Classic lives up to its name appeared first on Time+Tide Watches.

HANDS-ON: One simple word that makes the Longines Record a big deal Time+Tide
Longines Record May 1, 2017

HANDS-ON: One simple word that makes the Longines Record a big deal

Here at Time+Tide we make no bones about being greatly enamoured of Longines’s heritage offerings, so it’s understandable that we made a beeline for the Lindbergh and 1945 models. However, our attention was rapidly drawn to the comparatively pared-back Record, which intrigued us with one simple word on its dial – ‘chronometer’. Now, in case you’re not … ContinuedThe post HANDS-ON: One simple word that makes the Longines Record a big deal appeared first on Time+Tide Watches.

VIDEO: The Planet Ocean ‘Big Blue’ is “one of the most interesting” in Omega’s new collection, says CEO Time+Tide
Omega s new collection says Mar 23, 2017

VIDEO: The Planet Ocean ‘Big Blue’ is “one of the most interesting” in Omega’s new collection, says CEO

According to the CEO of Omega, Raynald Aeschlimann, the Planet Ocean ‘Big Blue’ Co-Axial Master Chronometer is “one of the most interesting” watches to be launched by Omega at Baselworld 2017. It represents, he says, a “continuation of Omega’s technological advances, a full ceramic blue Seamaster Planet Ocean, which is coming as a very nice … ContinuedThe post VIDEO: The Planet Ocean ‘Big Blue’ is “one of the most interesting” in Omega’s new collection, says CEO appeared first on Time+Tide Watches.

BREAKING: The TAG Heuer Connected Modular 45 – a smart watch, a mechanical watch and a tourbillon, all in one Time+Tide
TAG Heuer Connected Modular 45 – Mar 13, 2017

BREAKING: The TAG Heuer Connected Modular 45 – a smart watch, a mechanical watch and a tourbillon, all in one

TAG Heuer has just announced the “first luxury connected watch bearing the Swiss made label” and a new concept that allows you to change the smart watch module (the whole case, in other words) for a mechanical module; either a time-only automatic Calibre 5 or a COSC-certified chronograph Tourbillon Heuer 02-T. The concept of modularity also … ContinuedThe post BREAKING: The TAG Heuer Connected Modular 45 – a smart watch, a mechanical watch and a tourbillon, all in one appeared first on Time+Tide Watches.

Zenith Christophe Colomb Revolution
Zenith Christophe Colomb Zenith recalls Mar 25, 2016

Zenith Christophe Colomb

Zenith recalls the pioneering days of exploration with its tourbillon alternative   In 1916, Zenith produced a new escapement called the Echappement Colon - Colón being the Spanish word for Columbus, and échappement the French word for escapement. This Lépine-style chronometer movement was 20½ lines in size and was awarded three first prizes by Neuchâtel’s observatory […]

First Look – Chapter Two in the Revival of L. Leroy with the New Elyor Flying Tourbillon Monochrome
Apr 24, 2026

First Look – Chapter Two in the Revival of L. Leroy with the New Elyor Flying Tourbillon

Parisian watchmaking maison L. Leroy was founded by Basile-Charles Le Roy in 1785 and became the official watchmaker to King Louis XVI and later to Napoleon I and Queen Victoria. Expanding operations to Switzerland, L. Leroy produced marine chronometers for the French Navy and amassed 384 gold medals in chronometry competitions. Iconic masterpieces like the […]

Watches & Wonders: Jaeger-LeCoultre Reintroduces the Master Control Collection and their “HPG” Designation Worn & Wound
Jaeger-LeCoultre Reintroduces Apr 20, 2026

Watches & Wonders: Jaeger-LeCoultre Reintroduces the Master Control Collection and their “HPG” Designation

In addition to a barrage of ultra high end novelties, Jaeger-LeCoultre this week has introduced the new Master Control Chronometre collection, with a focus on chronometric elegance with watches featuring a sleek new integrated bracelet sports watch design. Jaeger-LeCoultre has a long history, of course, of not just pure movement making and horology, but in providing certainty behind their movements through the Master Control collection, which was a testing certification conducted in-house over 1,000 hours. The Master Control Chronometre collection continues that tradition while also filling a gap in the brand’s catalog: a (relatively) accessible everyday watch that is not a Reverso.  Before getting into the watches themselves, we’ll start with an overview of what “Master Control” really means in 2026. This collection reintroduces the brand’s “High Precision Guarantee” designation, which is an update of an old standard first used on JLC’s Calibre 916, their renowned 4 Hz caliber introduced in 1970. The new HPG designation evaluates performance across four metrics: altitude (certifying that the watch can withstand pressure up to 1004 meters above sea level, the altitude of the JLC manufacture), multi-directional shocks, testing in multiple positions, and variances across temperature. Jaeger-LeCoultre has developed new machinery to test for these conditions, which the brand says can simulate real world use over a long duration in just three days of actual tes...

Live from WWG26: the new release from Ferdinand Berthoud Deployant
Ferdinand Berthoud Apr 16, 2026

Live from WWG26: the new release from Ferdinand Berthoud

DEPLOYANT - The watch magazine for collectors, by collectors Ferdinand Berthoud flipped their movement released 10 years ago in the FB 1. The new watch is Chapter 1 Chronomètre FB 2TV is like an inverted version of the FB 1. But of course, as this is a Ferdinand Berthoud, the entire movement is reworked to flip over, and the entire movement is now visible [...] The post Live from WWG26: the new release from Ferdinand Berthoud appeared first on DEPLOYANT.

World’s Oldest Watch Store Acquired by Patek Philippe SJX Watches
Patek Philippe Mar 31, 2026

World’s Oldest Watch Store Acquired by Patek Philippe

With a history dating back 266 years, Beyer Chronometrie is the world’s oldest watch store, but not for much longer: the store has been sold to Patek Philippe and will close at the end of the year. This turn of events echoes the sale of Bucherer to Rolex three years ago. Come next year, the store with its prime location on Zurich’s posh Bahnhofstrasse will be replaced by an enlarged Patek Philippe boutique. The news was first reported by Swiss newspapers including Neue Zürcher Zeitung (NZZ) and Tages-Anzeiger. The sale is perhaps not that surprising given the store’s longtime owner, René Beyer, passed away in 2025 without an heir. The business was passed onto Beyer’s sister, Muriel Zahn-Beyer, who has no children of her own either. According to Ms Zahn-Beyer, speaking to the NZZ, the late René Beyer already planned for the sale prior to his death, having sold a minority stake in the business to Patek Philippe in 2024. Patek Philippe and Beyer have long been partners; in fact, Beyer is also the world’s oldest Patek Philippe retailer, having started carrying the brand around 1842, just a few years after the watchmaker was established in 1839. As a consequence, Beyer was perhaps one of the watchmaker’s most significant retailers, despite having only one store. With the takeover, the multi-brand section of the Beyer store will close, while its existing Patek Philippe boutique will be enlarged. This also means a third of Beyer’s current employees will be kept o...

Insight: F.P. Journe Répétition Souveraine Smoked Sapphire SJX Watches
F.P. Journe Répétition Souveraine Smoked Sapphire Dec 16, 2025

Insight: F.P. Journe Répétition Souveraine Smoked Sapphire

The Répétition Souveraine is one of the more unusual minute repeaters on the market, combining classical inspiration with an idiosyncratic technical approach that is unmistakably F.P. Journe. Based on the familiar architecture of the Chronomètre Souverain yet fundamentally reworked to accommodate a striking mechanism, it is neither a conventional integrated repeater nor a simple modular add-on. Launched in 2008 with a conventional dial and briefly the thinnest contemporary minute repeater on the market, the latest iteration of the Répétition Souveraine reveals its workings through a smoked sapphire dial, offering a direct view of its flat gongs and strike train while underscoring François-Paul Journe’s distinctive philosophy of clarity, compactness, and mechanical logic. This is our third encounter with the Répétition Souveraine, having already covered the silver-dial variant and the elusive “Black Label” edition. Almost modular Most independents – and many large brands – rely on a handful of external specialists like Le Cercle des Horlogers or decades-old ebauche stocks for their repeaters. As a result, most repeaters take the same, time-tested, approach with only a few exceptions. Most are integrated designs that put the repeater train, hammers, and gongs on the same level as the rest of the movement. The rejuvenation of mechanical matchmaking during the 1980s and 1990s brought with it demand for systems that brands could add to existing movements. Amo...

In-Depth – The Superb Breguet Classique 7225, and the Refinement of the Magnetic Pivot Monochrome
Breguet Classique 7225 Nov 26, 2025

In-Depth – The Superb Breguet Classique 7225, and the Refinement of the Magnetic Pivot

Until recently, for those who have followed Breguet‘s exploits in modern chronometry, one watch has long occupied a special place: the Classique Chronométrie 7727, from 2013. The 7727 demonstrated what high frequency could achieve when combined with silicon components and, quite provocatively, when magnetism, a force that watchmaking usually fears, was not only controlled but […]

Style and Substance in Greubel Forsey’s QP Balancier SJX Watches
Greubel Forsey s QP Balancier Greubel Sep 4, 2025

Style and Substance in Greubel Forsey’s QP Balancier

Greubel Forsey repackages its cutting edge perpetual calendar in a sleeker, more accessible format as the QP Balancier. It’s still a highly legible calendar that adjusts forward and back via the crown without need of tools or fear of damage. Despite the simpler styling, the QP Balancier retains the high-end movement decoration the brand is known for. Initial Thoughts Greubel Forsey was arguably a latecomer to the world of complications, spending its first decade on chronometry, refining the tourbillon. The brand’s first complication, the GMT presented in 2011, applied an unfamiliar approach to a familiar complication. That set the tone for the brand’s first perpetual calendar four years later – the Quantième Perpétuel à Équation. At its heart was a “mechanical computer” programmed with 48-month leap year cycle that allowed the calendar to be adjusted forward and back without issue, all from the crown. The Quantième Perpétuel à Équation of 2015 While the result is not novel, – Ulysse Nardin and H. Moser & Cie. have bi-directional perpetual calendar as well – the method certainly is. Greubel Forsey paired the mechanical computer with a similarly sophisticated in-line display – using four layers of stacked disks – making its perpetual as easy to read as it is to use. The new QP Balancier is a more focused watch than its predecessor, as it does away with the 24-second inclined tourbillon and equation of time. While wider, the case is also slimmer an...

King Seiko SPB389 Review Teddy Baldassarre
Seiko Aug 22, 2025

King Seiko SPB389 Review

Everyone knows about Seiko and Grand Seiko, but…what exactly is King Seiko? Well, King Seiko is one of those cult-classic throwbacks that dodges easy categorization or market segmentation. The 1960s elegance and sheer retro vibes exuded by this collection is charming and a little quirky in a world where big brother Grand Seiko has reached downright mainstream status. In 2021, the King Seiko KSK SJE083 resurrected the historic KSK model and the collection has slowly grown since then under the Seiko Luxe collection of higher-end offerings. Here we see the Seiko SPB389, which is a mid-century-inspired watch that will appeal to the kind of person who loves being early to a trend. Seiko Luxe Explained First off I wanted to address the Seiko Luxe collection, because I know not everyone is up to date with the tiers of Seiko. Where standard Seiko is your more classic, accessible fare, the Seiko Luxe collection is the higher-end series that consists of offerings like King Seiko as well as Presage watches with special touches like enamel dials and the more refined pieces in the Prospex collection. Seiko Luxe generally starts around the $750 mark and goes up to over $3,000, so the range is quite broad. Personally, the only Seiko watch I’ve ever purchased is from the Seiko Luxe collection (an enamel dial Presage I reviewed here) and it really is so much watch for the money. King Seiko SPB389 Case and Bracelet When King Seiko first returned to the scene a couple of years back, it w...

Hands-On: the Apiar Gen1.0 Worn & Wound
Aug 15, 2025

Hands-On: the Apiar Gen1.0

The British brand Apiar has an intriguing slogan emblazoned across the front page of their website: Impossible Watches. Made Possible. If you spend enough time thinking about watches, collecting watches, and learning about watches, you begin to realize their limitations. Whether they’re chronometry related or have to do with the design and build of the watch itself, there are certain things that just can’t be done, or else stretch the limits of our current technology to the point where those things aren’t remotely feasible. The crazy idea you had for a watch case that defies the laws of physics might be something that only exists on paper.  Additive manufacturing and 3D printing technologies have the potential to change that. When a metal object is formed by adding material to it rather than stripping it away, a manufacturer can create shapes, textures, and structures that would be impossible otherwise. Apiar’s Gen1.0 is a thrilling example of the possibilities of 3D printing in watch manufacturing. They’re by no means the first to create watches this way, of course, but they’re part of a new class of brands using the technology in an experimental way that seems to finally make the most of it, creating not just beautiful objects that defy watchmaking convention, but watches that redefine our expectations around durability, lightness, and other metrics by which all of us evaluate these things. Importantly, the use of additive manufacturing also democratizes wat...

Hands On: Grand Seiko Tokyo Lion Tentagraph SLGC009 SJX Watches
Audemars Piguet Royal Oak Concept Jul 18, 2025

Hands On: Grand Seiko Tokyo Lion Tentagraph SLGC009

Grand Seiko returns to its Sport Collection with an even bolder and edgier take on its flagship chronograph with the Tokyo Lion Tentagraph SLGC009. Combining an oversized case Brilliant Hard Titanium and a high-spec, high-beat chronograph movement, the striking new is Tentagraph is surprisingly not an all-new design but an iterative evolution that builds on the existing Sport Collection case. Initial Thoughts While a strength of Seiko itself, chronometry-focused Grand Seiko has historically struggled with sports watches, though not for lack of trying. In 2019 Grand Seiko launched the angular and aggressive Sport case featuring a facetted, polygonal form with a sapphire-covered bezel to celebrate 20 years of Spring Drive. Grand Seiko intended the design to evoke the mane of the brand’s lion mascot. In 2023 came the regular production Tokyo Lion series, and the brand also extended the design language into its jewelled Masterpiece watches. The “lion’s mane” case design reminds me of the Audemars Piguet Royal Oak Concept, and with the addition of an octagonal bezel the resemblance has only grown, though I wouldn’t say it is derivative – if anything the Grand Seiko case is a more boisterous take on the 45GS design from the late 1960s. The earlier Spring Drive GMT Chronograph SBGC275 with a less stylised case design I quite liked the Sport case when it was launched in 2019, especially the rose gold SBGC230, but it felt unfinished with a round bezel and buttons. With...