The Super COSC, slated to debut in 2026, presents a new proposition for Swiss wristwatch certification. Building upon the respected foundations of the Contrôle Officiel Suisse des Chronomètres (COSC) chronometer standard of 1973, this evolution aims to improve its scope and relevance to meet the modern demands and use cases of a watch.
The existing COSC standard predominately places focus on a watch’s movement alone, requiring it to be adjusted to a precision of -4/+6 seconds per day before being sealed. Super COSC, however, aims to certify the entire assembled timepiece, with an ambitious focus towards the real-life usage of a wristwatch. Interestingly, the Super COSC will exclude water resistance testing - a departure from similar watch standards set by Rolex’s Superlative Chronometer and METAS’ Master Chronometer.