Results for Master Chronometer (METAS)

COSC, METAS or TIMELAB? Why Chronometry Still Matters Despite Atomic Time

Everything you need to know about METAS

As far as chronometer certifications go, there’s no standard that is more misunderstood than the one set by METAS. We explain what it entails.The post Everything you need to know about METAS appeared first on Time+Tide Watches.

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...

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...

Introducing - Hearing is Believing with the Unique Parmigiani Fleurier L’Armoriale Répétition Mystérieuse

Once upon a time, antique timepiece restorer and master watchmaker Michel Parmigiani was encouraged by the Sandoz family to create a manufacture. Known as Parmigiani Fleurier, the fully independent manufacture produced exquisite high-end watches, over thirty in-house movements and fascinating table clocks equipped with automata. With the arrival of CEO Guido Terreni in 2021, the […]

Dubai police turn Rolex rescuers to salvage Yacht-Master from ocean floor

A few days ago, Hamid Al Ameri was partying with mates on a yacht in the waters off Palm Jumeirah in Dubai. At some stage, one of the group decided to go for a swim and jumped off the side of the boat. Somehow his watch came off his wrist as he entered the water … ContinuedThe post Dubai police turn Rolex rescuers to salvage Yacht-Master from ocean floor appeared first on Time+Tide Watches.

Gold rush: Rolex reintroduces the GMT-Master II in solid yellow gold and two-tone

The Rolex GMT-Master II is reintroduced in yellow gold and two-tone for Watches & Wonders 2023. Brand new is a bicolour black and grey Cerachrom bezel. The beloved Jubilee bracelet gets the Midas touch. The Pepsi. The Rootbeer. The Batman. Can I suggest “Goldfinger” as the latest Rolex GMT-Master II variant nickname? Honor Blackman wore … ContinuedThe post Gold rush: Rolex reintroduces the GMT-Master II in solid yellow gold and two-tone appeared first on Time+Tide Watches.

Watch photography made easy: How to master the pocket shot

Introduction Whether it’s flaunting your bling or showing your mates just how good that new tropic strap looks on your Seiko Turtle, there’s no denying that the modern interest in watches is massively fuelled by Instagram,  Alongside the wrist roll and the flat-lay shot, one of the most popular depictions is the apparently casual pocket … ContinuedThe post Watch photography made easy: How to master the pocket shot appeared first on Time+Tide Watches.

Rado Masters a New Material with Captain Cook Bronze

Rado has unveiled a new bronze version of the iconic Captain Cook diver, the first time the self-styled “Master of Materials” has made a bronze-cased watch.

Mido brings COSC certification to the Multifort TV Big Date with its new Multifort TV Big Date Chronometer

The Mido Multifort TV Big Date Chronometer gets a new blue checkerboard dial and COSC-certified Calibre 80 movement

There Are Only 33 Of These: Introducing The Black-Dial Brellum Pandial 43 Power Reserve LE Chronometer

The first Brellum Pandial Power Reserve Chronometer LE I ever saw indeed had a panda dial. The white dial with black sub-registers created the famous look so many desire. The latest Pandial is like a panda suffering from melanism; it’s fully black. It does give this latest Brellum chronograph, a limited edition of just 33 […] Visit There Are Only 33 Of These: Introducing The Black-Dial Brellum Pandial 43 Power Reserve LE Chronometer to read the full article.

Longines adds a Monopusher and more to updated Master Collection

The brand debuts new Longines Master Collection Chrono Monopusher, Chrono Moonphase, and 30mm, 34mm, 39mm, and 41mm time and date models.

Longines Impressively Expands The Master Collection

Within the Longines lineup, the Master collection focuses on the rich history of the brand’s craftsmanship and watchmaking elegance. Back in June, the time-and-date Master models got a complete overhaul. Longines now introduces a new dial variation of the Master 41, an updated version of the Master Chrono Moonphase, and the impressive Master Chrono Monopusher. […] Visit Longines Impressively Expands The Master Collection to read the full article.

A Heavenly “Match” - The Olympique De Marseille × Jacques Bianchi Marseille JB200 Chronometer Limited Edition

“Droit au But,” translated roughly as “Straight to the Goal,” has been Olympique de Marseille’s motto since the club’s foundation in 1899 and appears beneath the “OM” crest. OM is one of the most recognizable clubs in French football. Its greatest achievement came on May 26th, 1993, when OM defeated AC Milan 1–0 in Munich […] Visit A Heavenly “Match” — The Olympique De Marseille × Jacques Bianchi Marseille JB200 Chronometer Limited Edition to read the full article.

MAT Watches Introduces The Whimsical Egg Master II

Generally, watches are serious business. At least to most of us, they are. But that doesn’t mean there isn’t room for some fun. Some good examples are the many seconde/seconde/ collaborations we have seen from various brands. Obviously, the theme should appeal to you and make you like one of these whimsical timepieces. If there […] Visit MAT Watches Introduces The Whimsical Egg Master II to read the full article.

Formex Enters The Arena Of Integrated-Bracelet Watches With Its Aria Manufacture Chronometer

As a small brand, Formex has consistently pushed the boundaries of affordable watchmaking. By using new materials, integrating innovations, and simply creating a great, varied collection of watches, the young Swiss brand has stood out in recent years. With the new Aria Manufacture Chronometer, Formex unveils a new milestone for the company. It marks a […] Visit Formex Enters The Arena Of Integrated-Bracelet Watches With Its Aria Manufacture Chronometer to read the full article.

Introducing: Serica Downsizes Its Field Chronometer With The 35mm Ref. 7505

What We Know It's time to put aside the debate of big watches versus small watches. I think we can at least agree that options are a good thing, so everyone can get what they want. With that in mind, Serica has released three new, smaller Field Chronometer watches measuring only 35mm by 9.6mm thick with a COSC-certified automatic movement and three new enamel dials. These three new watches, with stainless steel cases, play off the design language of the ref. 6190 with a few tweaks. There's the slightly larger, fixed bezel with pips at 3, 6, 9, and 12 o'clock. They have a double-domed anti-reflective sapphire that should somewhat magnify the smaller dial. The two-tone cream-and-black "Tuxedo" dial is similar to the ref. 6190 TXD, with hand-applied numerals. The other two, the "Minute Critical" dials in black or olive green, aren't that far from the ref. 6190 "Denali" that is already on offer in a larger size, with added 5-minute Arabic numerals. All three have Super-LumiNova C3 lume. Inside the case is the SoProd M100 movement, which is COSC-certified for accuracy, making it a Field Chronometer in both name and function. The caliber runs at 4Hz, is self-winding, and has a 42-hour power reserve. According to Serica, it also has a decorated plate with Côtes de Genève, and while there are no photos of the caseback, I would assume it is still a closed caseback like its big sibling.  Then there's the final major update: the watch comes with a redesigned Bonklip bracelet, fea...

Sunday Morning Showdown: Grand Seiko Evolution 9 Spring Drive U.F.A. Ushio 300 Vs. Rolex Yacht-Master 42 In Titanium

Grand Seiko surprised friend and foe at Watches and Wonders when the brand released a smaller, more accurate dive watch at a lower price than its predecessor. The Ushio 300 diver, naturally, was met with applause. So, for this week’s showdown, we thought we’d stack it up against a watch so popular that it is […] Visit Sunday Morning Showdown: Grand Seiko Evolution 9 Spring Drive U.F.A. Ushio 300 Vs. Rolex Yacht-Master 42 In Titanium to read the full article.

Jaeger-LeCoultre reinvents the Master Control collection with an integrated twist

A new era for the Master Control collection with fully integrated bracelets in three new models and one new movement. The post Jaeger-LeCoultre reinvents the Master Control collection with an integrated twist appeared first on Time+Tide Watches.

The Yacht-Master II’s Encore

In a rather surprising move, Rolex unveiled a revamped and re-engineered version of the Yacht-Master II. Although the original was discontinued in 2024 the Geneva-based brand decided to give the quirky watch another chance at life, while also making the user’s life much easier.  Initial thoughts The original Yacht-Master II was undoubtedly a polarising timepiece. People would either love the bulky aesthetics or instantly dismiss it as an unpalatable timepiece. Add to that the complicated Command Ring bezel programming sequence for the regatta timer and the result is a perhaps the quirkiest Rolex creation in modern times.  Apparently the timepiece was performing well enough to warrant an encore. The Yacht-Master II was thus updated to include both Rolex’s latest innovations (such as the Chronergy escapement) and a revised user interface.  In terms of aesthetics, the 44 mm timepiece is still hard to love at first, but definitely not as excessive as past versions. The biggest change was perhaps the shift to a regular bi-directional 60 minute click bezel, which replaced the cumbersome Command Ring system used previously.  The ten-minute countdown markings were moved to a raised flange on the dial. The regatta minutes and seconds hands now turn counterclockwise, a suggestive way of approaching countdown.  Although few Yacht-Master II pieces will realistically be used for yacht race timing, the complication can be as useful as any given chronograph. The new caliber 4162...

Introducing: Three New Jaeger-LeCoultre Master Grand Complications

Just as Stevie Wonder is the musician’s musician, Jaeger-LeCoultre is the watchmaker’s watchmaker. But what is meant by this? Well, for starters, Jaeger-LeCoultre is a prolific movement manufacturer that supplies other high-end brands. Famously, Jaeger-LeCoultre’s ultra-thin caliber 920 powered the big three ’70s sports watches - Patek Philippe’s Nautilus, AP’s Royal Oak, and Vacheron Constantin’s […] Visit Introducing: Three New Jaeger-LeCoultre Master Grand Complications to read the full article.

Serica Introduces the 5330 Dive Chronometer

One of watchmaking’s simplest but most iconic complications, the date window, is the source of much admiration, and yes, a little bit of ire. One of the biggest points of contention on any inclusion of a date window is the balancing of it on the dial; after all, how do you place it to not ruin the symmetry (or asymmetry) of a carefully-crafted design? With their new Ref. 5330 Dive Chronometer, Serica has chosen a sleek solution for their first date window inclusion: nestle it at 3 o’clock, taking the place of the marker, and give it a crisp red accent to stand out. Sure, it’s not necessarily revolutionary, but it adds a sophisticated touch to an already clean dial. The core tenets of the 5330’s design carry over from other models in Serica’s Dive Chronometer lineup, with circular hour markers and a double graduation bezel being the most recognizable, and a 39mm 316L stainless steel case housing an identical SoProd M100 Swiss automatic movement. The matte black dial and anthracite-grey outer bezel ring contrast with the steel of the inner bezel and case, and the cream Super-LumiNova on the hands and hour markers. Similarly, the cream date window and red numeral add both a sense of cohesion and a highly legible flash of color to give the dial an extra layer of aesthetic complication. It’s certainly a welcome addition visually, and keeps the design from feeling too austere.  At 12.2mm in thickness and 46.5mm lug-to-lug, the 5330 is sized well for most wrists, and...

Serica Introduces The 5330 Dive Chronometer - The Brand’s First Watch To Feature A Date Window

The guys at Serica take their vintage-inspired designs very seriously. The brand’s watches are all about the perfect proportions, high legibility, and great wearability. Up until now, a date window wasn’t part of that equation. However, as representatives of many brands tell us, some people won’t buy a watch unless it has a date window. […] Visit Serica Introduces The 5330 Dive Chronometer - The Brand’s First Watch To Feature A Date Window to read the full article.

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.

Has Rolex discontinued the GMT-Master II Pepsi?

Discontinuation rumours around the Rolex GMT-Master II "Pepsi" are nothing new, but a new development may mean they now have more legs.The post Has Rolex discontinued the GMT-Master II Pepsi? 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.

Hands-On: The Brellum Duobox 39 Ice Blue Mother Of Pearl Chronometer

We continue to be impressed by the watches from Brellum. The small brand produces a maximum of 299 pieces per year, which comprises several limited-edition releases. Today, we go hands-on with the latest model, the Duobox 39 Ice Blue Mother of Pearl Chronometer. Yes, that’s a lot of words, but the important details worth noting […] Visit Hands-On: The Brellum Duobox 39 Ice Blue Mother Of Pearl Chronometer to read the full article.

First Look - The Brellum Duobox 39 Ice Blue Mother-of-Pearl Chronometer

Last year it was pink; in 2026, it’s blue… Brellum continues to refine its compact, modern chronograph and presents a new version of its Duobox 39 ahead of Valentine’s Day. The Duobox 39 Ice Blue Mother-of-Pearl Chronometer 2026 is very much the same as last year’s pink MOP. Still, while the 2025 edition projected warmth, […]

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.

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 […]