ISO 3158:1976

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ISO 3158:1976 is an international standard that defines and designates the test positions for any timekeeping instrument, regardless of its type, design, or dimensions. This standard was published in 1976 and has been reviewed and confirmed in 2019. The main purpose of this standard is to provide a standardized way to refer to the different positions of a timekeeping instrument, ensuring consistency in testing and evaluation.