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Homepage>BS Standards>39 PRECISION MECHANICS. JEWELLERY>39.040 Horology>39.040.10 Watches>BS ISO 3159:2009 Timekeeping instruments. Wrist-chronometers with spring balance oscillator
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immediate downloadReleased: 2010-02-28
BS ISO 3159:2009 Timekeeping instruments. Wrist-chronometers with spring balance oscillator

BS ISO 3159:2009

Timekeeping instruments. Wrist-chronometers with spring balance oscillator

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Standard number:BS ISO 3159:2009
Pages:14
Released:2010-02-28
ISBN:978 0 580 68480 7
Status:Standard
DESCRIPTION

BS ISO 3159:2009


This standard BS ISO 3159:2009 Timekeeping instruments. Wrist-chronometers with spring balance oscillator is classified in these ICS categories:
  • 39.040.10 Watches

This International Standard lays down the definition of the term “chronometer”, describing the categories, the test programme and the acceptable minimum requirements for wrist-chronometers.

NOTE Wristwatches using a tuning fork oscillator are subjected to these tests pending the availability of separate standards.