The Timepiece Journal » watch certification

Everything you've ever wanted to know about COSC chronometer certification — answered clearly and concisely. From what the certificate means to whether it's worth paying for.

Ever received a chronometer certificate and wondered what all those numbers mean? This guide explains every field, every criterion, and what the data tells you about your watch movement.

Qualité Fleurier (QF) certification, founded in 2004 by Chopard, Bovet and Parmigiani, is one of the most comprehensive Swiss watch quality standards — covering COSC precision, movement finishing, and the unique Fleuritest real-world wear simulation.