Longines has had an obsession with high-frequency regulated timing gadgets for properly over a century now. The manufacture created their first 5Hz stopwatch with flyback perform, able to measuring 1/tenth of a second, as early as 1914, after which proceeded to outdo themselves with a 50Hz stopwatch in simply two years, in 1916. With a stability that clocked in at 360,000 vibrations per hour, the machine was able to measuring time as much as 1/a hundredth of a second. Because the wristwatch gained in recognition, Longines introduced their excessive frequency know-how to bear on this new kind too. To make some extent, the manufacture started sending these excessive frequency wristwatches off for certification to third-party validators and chronometric competitions held by the extremely regarded observatories, such because the Observatoire de Neuchâtel, and the Contrôle Officiel Suisse des Chronomètres (COSC). For sure, Longines claimed a number of accolades. 

This acclaim gave Longines the arrogance to push boundaries additional, finally difficult even digital watches. As a result of high-frequency watches beat quicker, additionally they exhaust their energy reserves rather a lot faster and the parts put on out quicker. To circumnavigate this, Longines patented a dry lubrication in 1966, which amongst many different factors of superb tuning, allowed for the calibre 431. This motion was in a position to assure accuracy of a minute a month, or two seconds per day. Such a regular far exceeded the necessities of COSC, the chronometer certification physique and thus, Longines boldly named the calibre 431-powered wristwatch, the Extremely-Chron. 

Nonetheless within the Sixties, Longines moved to case up calibre 431 right into a 200m water resistant dive watch dubbed the Extremely-Chron Diver. Right here is the place we decide up the linage of the 2022 reissued Extremely-Chron Diver. The modern Extremely-Chron Diver has been rendered in the identical cushion-shaped case of a specific 1968 Extremely-Chron Diver, together with its placing purple minutes hand. Seeking to the unidirectional bezel subsequent, we should acknowledge that Longines has positioned a sapphire insert on it with Tremendous-LumiNova in order that the dive bezel stays legible in dimmer circumstances. 

For the motion, Longines, in partnership with ETA, has developed the brand new calibre L836.6, which boasts a frequency of 5Hz. And within the spirit of the Extremely-Chron’s legacy, to indicate once more that Longines’ just isn’t merely blowing its personal high-frequency horns, the brand new Extremely-Chron Diver has been chronometer-certified by TIMELAB, an unbiased entity that can also be in control of the Poinçon de Genève mark of excellence. TIMELAB topics the timepiece to a collection of checks over 15 days, by which the watch is measured for accuracy at three temperatures: 8°C, 23°C and 38°C. Nonetheless, what units TIMELAB aside from its contemporaries is that its certification relies on testing cased-up actions — precise watches. COSC, by the use of distinction, confers its certification on base actions. 

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