Watches and Wonders 2026 : the COSC reveals the inner workings of its certifications
Excellence put to the test of reality. Expertise is no longer explained. It is demonstrated.
News
The new certification, acclaimed by the press
Since the announcement of our new certification, interest has continued to grow.
COSC Excellence Chronometer Certified
A milestone date for the COSC
Chopard Wins the Sports Watch Prize with the Alpine Eagle 41 SL Cadence 8HF
The “COSC-certified” Alpine Eagle 41 SL Cadence 8HF from Chopard has won the Sports Watch Prize.
Zenith: The G.F.J. Calibre 135 Wins at the GPHG and Receives Chronometer Certification
The COSC extends its warmest congratulations to Zenith for winning the 2025 Chronometry Prize at the GPHG with the new G.F.J.
Naissance d’une Montre 3
The COSC celebrates an exceptional horological achievement
World Watch Day
Faithful to its mission of precision and excellence, the COSC is taking part in the World Watch Day this October 10th at exactly 10:10 a.m, a symbolic time for watch enthusiasts around the world.
Calibership Challenge : And the winner is…
40 Sellita movements, 40 contenders, and just one hour to reach ultimate precision
COSC Arcade Game
Welcome to the COSC Arcade labs
