Tag: mechanical movements

C.O.S.C. – The ultimate precision in watch-making

Watches Sebastien Eich - 6 March 2016

COSC is Contrôle Officiel Suisse des Chronomètres, the Official Swiss Chronometer Testing Institute, which is the institute responsible for certifying the accuracy and precision of wristwatches in Switzerland. The COSC was founded by...

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Tag: mechanical movements

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