Historical

ISO 3159:1976

Timekeeping instruments -- Wrist-chronometers with spring balance oscillator

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.

CONTENT PROVIDER
International Organization for Standardization [iso]

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Timekeeping instruments -- Symbolization of control positions
Timekeeping instruments -- Movements -- Types, dimensions and nomenclature
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