
Introducing Hermès Unveils the Slim d’Hermès Cheval Brossé
Welcome to the hub of the horoloy
Contrôle Officiel Suisse des Chronomètres, is an independent Swiss organization responsible for certifying the performance and accuracy of mechanical watches through a series of tests on watch movements. It is considered one of the highest standards in the watch industry for measuring the performance and accuracy of watches.
The watch movement undergoes a series of rigorous tests and measurements under various temperature conditions over a specified period, typically up to 15 days. These tests evaluate the performance and accuracy of the watch.
To achieve the COSC certification, the average daily rate of the watch must fall within a specific range of -4 to +6 seconds per day. This means that the watch should not deviate more than -4 to +6 seconds from the exact time over a 24-hour period. Additionally, the movement must meet specific criteria for accuracy, stability, and reliability.
Opinion Understanding Jacob & Co. and Hublot
Introducing Czapek Expands the Promenade Collection with New Plissé Dials
Auction Sotheby’s Announces the Largest Auction Dedicated to Breguet Timepieces
Introducing Breitling Celebrates Amsterdam's Rich History on Its 750th Anniversary
Introducing Grand Seiko Two New Heritage 62GS 30mm STGK031 & STGK033
Introducing Ulysse Nardin Unveils The Blast[Amoureuxpeintre]