1 Scope
This International Standard specifies the types and fitting dimensions of mechanical and electromechanical watch-movements.
This International Standard is applicable to the five following types of movements:
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— Type 1: round;
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— Type 2: shaped round;
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— Type 3: round with double cutting;
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— Type 4: 5 ½′′′;
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— Type 5: 6 ¾ × 8′′′.