Timekeeping instruments -- Wrist-chronometers with spring balance oscillator
This standard has been revised by ISO 3159:2009
Lays down the definition of the term "chronometer", describing the categoeries, the test programme and the acceptable minimum requirements for wrist-chronometers. Wristwatches using a tuning fork oscillator are subjected to these tests pending the availability of separate standards.
A standard is reviewed every 5 years
Revisions / Corrigenda