Controle officiel suisse des chronometres

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

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

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 five watchmaking cantons of Switzerland: Bern, Geneva, Neuchâtel, Solothurn and Vaud, together with the Federation of the Swiss Watch Industry (FHS). It encompasses the laboratories/observatories that had been created independently of each other from the late 19th century. It is a non-profit organization and tends to certify…