The best of watchmaking at Watches & Wonders from April 1 to 7
The world's largest annual watchmaking trade show opens its doors again from April 1 to 7, 2025.
Swiss
Excellence
Certified
The universally recognized
and independent label certifying
Swiss watchmaking excellence.
Since 1973, the COSC has subjected every timepiece to uncompromising testing to certify its utmost precision.
COSC, SWISS EXCELLENCE CERTIFIED
Over 60 brands are certified by the COSC.
Founded at the initiative of Swiss watch brands, the COSC dedicates its expertise and independence to certifying watches destined to join the watchmaking legend.
Federations, schools, associations, trade shows or training programs... The COSC works hand in hand with all the key players in the Swiss watchmaking industry, united in their commitment to showcasing this unique expertise worldwide.
The COSC, a trusted partner of Swiss watchmaking excellence
- 2,4 million
- 55 million
- 44%
- 12 to 20
From heritage to innovation
For over 50 years, our equipment and processes have continuously evolved to keep pace with the latest innovations in Swiss chronometry. As watchmakers push the boundaries by creating ever more innovative timekeepers, the COSC is doing the same for time measurement.
