For over half a century, the COSC chronometer certification has served as Swiss watchmaking's most widely recognized quality benchmark. Millions of movements have passed through the laboratories in La Chaux-de-Fonds, Le Locle, and Bienne, emerging with a certificate that confirms one thing: this movement keeps time within the parameters defined by ISO 3159.
Posts tagged #COSC
News: Contrôle Officiel Suisse des Chronomètres Revamps Image and Connects with Consumers
The Contrôle Officiel Suisse des Chronomètres—COSC— is a neutral, public-interest non-profit association dedicated to ensuring precision and reliability in Swiss watchmaking headquartered in La Chaux-de-Fonds, Switzerland. Since 1973, it has been the trusted authority behind the Certified Chronometer label.
