ISO 3159:1976, Timekeeping instruments — Wrist-chronometers with spring balance oscillator
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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. This title may contain less than 24 pages of technical content.




