CHRONOMETER
Chronometer
Compliance with the definition of a WatchUnion chronometer movement is confirmed by a neutral official body (COSC), which inspects the movement and issues an official certificate. Each chronometer receives an engraved number and a certificate number issued by the COSC. Chronometer: Designation for a precise timekeeping device for various conditions of use (e.g. ISO 3159 for the mechanical wrist chronometer).
- - Technical information
- - Reassembly
- - Furniture
- - Technical drawing
- - COSC Chronometer certificate
Technical information in PDF format: