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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.

Bernhard Lederer Central Impulse Chronometer*: A Superlative Watch But Is It Really A Chronometer? Quill & Pad
Sep 20, 2020

Bernhard Lederer Central Impulse Chronometer*: A Superlative Watch But Is It Really A Chronometer?

According to Joshua Munchow, the Bernhard Lederer Central Impulse Chronometer is one of the most astounding pieces to be released in 2020, and when he first saw it on social media he actually gasped out loud. The more that he looked at it the more he fell in love with the style, the engineering, and the concept behind the movement. But he must ask: is it really a chronometer?

Insight: Barraud’s Weight and the Marine Chronometer SJX Watches
Aug 21, 2020

Insight: Barraud’s Weight and the Marine Chronometer

Although precision watchmaking is today mostly synonymous with Switzerland, the oft forgotten truth is that much of the technological progress and development in horology during the 18th and early 19th centuries originated in England. The preeminence of English watchmaking during that period is perhaps personified by John Harrison, the carpenter-turned-clockmaker best known for his invention of the marine chronometer. Harrison and his contemporaries advanced horology in an era where the pursuit of accurate timekeeping was of national importance for the United Kingdom: the marine chronometer enabled ships to traverse the highs seas while maintaining positional accuracy over extremely long distances, an achievement that no doubt helped the rise of the globe-spanning British Empire. The curious chronometer On a recent visit to Charles Frodsham & Co Ltd. – the English chronometer manufacturer now run by Philip Whyte and Richard Stenning that’s making wristwatches equipped with a natural escapement – a rather curious timekeeper from England’s heyday as a watch and clockmaking nation emerged. Dating to 1845, it was marine chronometer no. 2388 manufactured by Barraud, later Barraud & Lund, a now defunct English watchmaker (though a descendant of the company, Lund & Blockley, remains in operation to this day as a retailer in Mumbai). While the well-preserved state of the clock was impressive in itself, closer inspection of the movement revealed a peculiar feature. Sitting...

HANDS-ON: The new DOXA SUB 300 is slimmer, COSC-certified and more refined than its tool watch origins Time+Tide
Doxa SUB 300 Aug 11, 2020

HANDS-ON: The new DOXA SUB 300 is slimmer, COSC-certified and more refined than its tool watch origins

The meteoric resurrection of DOXA over the last 18 months has been both exciting and heartwarming to witness. What started out as a strong showing at Baselworld 2019 (think solid gold SUB 200T and SUB 200) has been followed by a succession of compelling offerings that neatly bridge the gap between heritage and contemporary watchmaking. … ContinuedThe post HANDS-ON: The new DOXA SUB 300 is slimmer, COSC-certified and more refined than its tool watch origins appeared first on Time+Tide Watches.

Omega Introduces the Constellation Co‑Axial Master Chronometer 39 mm SJX Watches
Omega Introduces Jan 17, 2020

Omega Introduces the Constellation Co‑Axial Master Chronometer 39 mm

After having modernised the Constellation for ladies two years ago, Omega has just done the same for the men’s model, revamping the watch inside and out. Now the full range of Omega’s bestselling model line – the Constellation is likely the most popular watch model in China – has been facelifted. The new gents’ Constellation Co‑Axial Master Chronometer line-up is 26 models strong, all of which share the same basic specs. While the signature Constellation design has been retained, the case and bracelet has been sharpened with subtle improvements that given it a substantially different look. And the case is also larger, at 39 mm instead of the 38 mm of the earlier generation. But most importantly, the new model is equipped with a Master Chronometer movement containing all of Omega’s latest tech. Nip and tuck Available in steel, yellow gold, Sedna gold as well as two-tone combinations, the new Constellation retains the classic barrel shape with concave facets at the top and bottom lugs, as well as the four bezel “claws” at three and nine o’clock. The overall design is, in short, fundamentally the same, but it has been improved in finishing and style, inside and out. The lines and surfaces of the case and bracelet are now cleaner and more pronounced, at the same time accentuated with improved finishing. While the bezel claws keep their traditional polished finish, most of the other surfaces are now brushed, with the case and bracelet featuring polished be...

What is the Rolex Superlative Chronometer Standard and why does it matter? Time+Tide
Omega has been steadily touting Apr 21, 2019

What is the Rolex Superlative Chronometer Standard and why does it matter?

Editor’s note: Timekeeping standards are suddenly cool again. Omega has been steadily touting the benefits of their Master Chronometer certification, Patek has their own standards, and Rolex recently upped their game with the Superlative Chronometer Standard. But what is it? This article from a while back explains everything you need to know. Since 1951, nearly … ContinuedThe post What is the Rolex Superlative Chronometer Standard and why does it matter? appeared first on Time+Tide Watches.

INTRODUCING: The COSC-Certified Longines Record Collection gets a luxe extension Time+Tide
Longines Record Collection gets Mar 20, 2018

INTRODUCING: The COSC-Certified Longines Record Collection gets a luxe extension

It was only a matter of time. And if you were a betting man, you’d have safely bet that it would be right on a year that Longines would double down on the Record Collection and offer it in gold. The benefits are immediate, giving the otherwise conservative new range a whole snap, crackle and … ContinuedThe post INTRODUCING: The COSC-Certified Longines Record Collection gets a luxe extension appeared first on Time+Tide Watches.

VIDEO: Exploring one of the most accessible COSC-certified collections on the market, the new Longines Record range Time+Tide
Longines Record range Accuracy used Dec 14, 2017

VIDEO: Exploring one of the most accessible COSC-certified collections on the market, the new Longines Record range

Accuracy used to be a big deal in watchmaking. There were competitions to test the accuracy of wristwatches. There were complications - additional functions - and engineering improvements designed to assist the watch in keeping true time. There was a space race of sorts to be the most accurate watchmaker in the world. The exploding popularity of … ContinuedThe post VIDEO: Exploring one of the most accessible COSC-certified collections on the market, the new Longines Record range appeared first on Time+Tide Watches.

VIDEO: A flashback through a year of Longines stories, and one last hurrah in Beijing to launch an aggressively priced new COSC-certified collection Time+Tide
Longines stories Nov 22, 2017

VIDEO: A flashback through a year of Longines stories, and one last hurrah in Beijing to launch an aggressively priced new COSC-certified collection

Many brands and many people have taken a chance on Time+Tide since we launched, way back in 2014. One of the greater leaps of faith was earlier this year, when Longines gave us permission to spend time in their archives, and extended a standing invitation to several international events. The aim was to create a … ContinuedThe post VIDEO: A flashback through a year of Longines stories, and one last hurrah in Beijing to launch an aggressively priced new COSC-certified collection appeared first on Time+Tide Watches.

ADVENT CALENDAR 2016: December 16 - Omega Speedmaster Moonphase Chronograph Master Chronometer Time+Tide
Omega Speedmaster Moonphase Chronograph Master Dec 15, 2016

ADVENT CALENDAR 2016: December 16 - Omega Speedmaster Moonphase Chronograph Master Chronometer

In terms surprises, at Christmas or at any other time, Omega releasing a new Speedmaster does not rank (sorry Omegamaniacs). In the last few years we’ve seen Speedies offered in every colour and design under the sun. That said, their latest, the in-no-way-economically named Speedmaster Moonphase Chronograph Master Chronometer is, in fact, pretty eye-opening, mouth-watering and wallet-tempting. It’s hot, … ContinuedThe post ADVENT CALENDAR 2016: December 16 – Omega Speedmaster Moonphase Chronograph Master Chronometer appeared first on Time+Tide Watches.

Zenith x Kari Voutilainen x Phillips Calibre 135 Observatoire: 10 of the World’s Highest Precision, Competition-Winning Chronometer Movements Ready for the Wrist - Reprise Quill & Pad
Zenith x Kari Voutilainen x Sep 2, 2023

Zenith x Kari Voutilainen x Phillips Calibre 135 Observatoire: 10 of the World’s Highest Precision, Competition-Winning Chronometer Movements Ready for the Wrist - Reprise

After seven decades carefully stored away in the Zenith archives, ten of the original chronometry competition-winning movements find their way into a limited set of new watches thanks to Phillips, legendary independent watchmaker Kari Voutilainen, and Zenith's current management.

Insight: Daniels’ Co-Axial Escapement, an Evolution of the Fasoldt Chronometer SJX Watches
Omega Feb 21, 2023

Insight: Daniels’ Co-Axial Escapement, an Evolution of the Fasoldt Chronometer

In the quest for precision chronometry in a mechanical watch, perhaps no other component is as crucial as the escapement – often consisting of an escape wheel and lever that engage with the oscillating organ. The history of watchmaking recounts many an attempt at inventing a better-performing escapement, with some attempts naturally more successful than others. By the 20th century, the watch industry had settled upon the Swiss lever escapement, which has proven itself to be a reasonably solid performer and crucially, one fit for mass production. However, in the latter decades of the century, one English watchmaker attempted to challenge the industry status quo. In 1974, George Daniels invented the “co-axial escapement”, a seemingly novel and practical escapement of his own design that was conceived as an functionally superior alternative to the Swiss lever escapement. Daniels’ invention fulfilled his ambition, at least in part, when it was sold to Omega and then successfully industrialised starting in 1999; today it is found in hundreds of thousands of movements that Omega produces each year. The latest iteration of the Omega Speedmaster Moonwatch is kitted out with the co-axial escapement With the merits of the co-axial escapement having been proven in part by its large-scale adoption, my aim here is not to examine its intrinsic qualities, but rather delve into its development. Specifically I will explore the fact that the co-axial escapement might not be an ent...

Introducing: The Aria Manufacture Chronometer From Formex Hodinkee
Formex What We Know Jun 1, 2026

Introducing: The Aria Manufacture Chronometer From Formex

What We Know The last time I covered something from Formex was over a year ago, when the brand released a highly finished, full-ceramic sports watch, complete with a ceramic bracelet and even a ceramic micro-adjust clasp, at an unrivaled price point. Today, the brand continues its upmarket trend with a brand-new watch design called the Aria. The Aria takes the form of a broad, integrated-bracelet design in full grade 5 titanium. The 40mm case feels broader than normal, thanks to an impressively thin case height of 6.9mm, even though the lug-to-lug is still quite reasonable at 45.45mm. While the silhouette gives a smooth look, there's quite a bit of contrasting finishing going on here, with brushing of the titanium case and bracelet links done entirely by hand. Though the styling certainly leans towards its identity as a bold sports watch, there's a lot of subtlety in the design, for example, with the individual bracelet links being slightly curved or the extra dimensionality of the layer of titanium peeking out from each link's milled-out spaces. The clasp includes Formex's proprietary micro-adjust system, which provides extra space on both sides of the bracelet by pulling or pushing each side. There are three dials for the Aria: "Selva Green," "Ardesia Grey," and "Denso Blue." All three have a certain muted look to the hue, matching the slightly darker nature of titanium. Dimensionality is achieved through contrasting indices in rose-gold coloring, set on applied raised p...

Interview: Zenith’s Product Chief Officer on Reviving the Chronometer Cal. 135 SJX Watches
Zenith s Product Chief Officer May 25, 2026

Interview: Zenith’s Product Chief Officer on Reviving the Chronometer Cal. 135

For much of the past quarter-century, Zenith has built its brand on the back of the El Primero — a fast-beating chronograph calibre that debuted in 1969. But last year — for its 160th anniversary — the brand revived the time-only calibre 135 – a legendary competition calibre originally developed in the late 1940s. The reborn movement debuted within a new collection — the GFJ — named after founder Georges Favre-Jacot. To better understand what lies behind the relaunch of the cal. 135, we talked to Romain Marietta, Chief Product Officer at Zenith. David Serra, Technical Director of Movement Development, provided additional production insights. As Mr Marietta explains, the relaunch of the cal. 135 opens a new chapter for Zenith — more exclusive and more artisanal, featuring precious materials, elevated finishing and a classical aesthetic inspired by the designs of the 1950s. In short, closer to the independent watchmakers’ approach and to their audience. And this is only the beginning — the Le Locle-based brand has plans to further develop both the calibre and the collection. The interview was edited for length and clarity. Yannick Nardin (YN): Let’s start at the beginning: what makes cal. 135 so special? Romain Marietta (RM): For context, it was produced from 1949 until 1962. At the time, the pursuit of precision had a real genuine meaning. Watchmakers measured their strength, stature and reputation through the prizes they won. This movement was created f...