COSC - Chronometer Certification

The Fleurier Quality Foundation label is undoubtedly the most demanding of all watch certifications. It embodies the essence of Haute Horlogerie according to Chopard. The certification process consists of a succession of 4 stages aiming to guarantee not only the watch movement’s precision, but also its reliability, its durability and the quality of its aesthetic finish. One of them is the Chronometer certification. The movements are submitted to the entire series of tests in accordance with the ISO 3159 norm. All of the movements submitted for Fleurier Quality certification must have passed the tests. “Chronometer-certified” means that the movement of a watch is adjusted to within a tolerance of between -4 /+6 seconds per 24 hours, corresponding to 99.99 % precision. This supreme guarantee of reliability and precision is issued by the Swiss Official Chronometer Testing Institute (Contrôle Officiel Suisse des Chronomètres, COSC), an independent organisation certified by the Swiss Accreditation Service (SAS). Follow us on: https://www.instagram.com/chopard