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This being the case, the totality of the checks (magnetism, operation, and water resistance) guarantees a very high-quality mechanical watch for the end customer. Mechanical watches can be first COSC ISO 3159 "Chronometer" certified and after that METAS N001 "Master Chronometer" certified when all the relevant requirements are met.
A chronometer (Ancient Greek: χρονόμετρον, khronómetron, "time measurer") is an extraordinarily accurate mechanical timepiece, with an original focus on the needs of maritime navigation. In Switzerland , timepieces certified by the Contrôle Officiel Suisse des Chronomètres ( COSC ) may be marked as Certified Chronometer or ...
Bozeman Watch Company was a watch manufacturer based in Bozeman, Montana. The company received certification for its mechanical components from the Contrôle officiel suisse des Chronomètres (COSC), [1] an organization recognized for its precision standards. Bozeman Watch Company went out of business on May 9, 2015. [2]
Much as a mechanical dive watch might be seen as an vestigial appendage of a bygone era, however, one would do well to keep the old quote from General James Gavin about paratroopers in mind ...
Where "Chronograph" refers to the function of a watch, chronometer is a measure of how well a given mechanical timepiece performs: in order to be labeled a chronometer the timepiece must be certified by the COSC, the official Swiss Chronometer testing institute, [20] after undergoing a series of rigorous tests for robustness, accuracy and ...
In more expensive high-end quartz watches, thermal compensation can be implemented by varying the number of cycles to inhibit depending on the output from a temperature sensor. The COSC average daily rate standard for officially certified COSC quartz chronometers is ±25.55 seconds per year at 23 °C or 73 °F. To acquire the COSC chronometer ...
Of the millions of watches produced in Switzerland each year by all manufacturers in the mid-1960s, approximately 250,000 would receive official chronometer status (similar to what would be COSC standards today), and only a few hundred of the very best from the total production would be sent to an observatory for chronometer accuracy ...
Breitling Chronomat men's watch ref. B13050 Made in Switzerland. The Chronomat is a collection from Breitling released in 1942, [10] and remains one of the best-selling models produced by the manufacturer. [11] The first Chronomat had a circular slide rule and its design was inspired by military watches. [10]
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