Historical
ISO 3764:2000
Timekeeping instruments -- Movements -- Types, dimensions and nomenclature
This International Standard specifies the types and fitting dimensions of mechanical and electromechanical watch-movements.
This International Standard is applicable to the four following types of movements:
- Type 1: round;
- Type 2: shaped round;
- Type 3: 5 ½″′;
- Type 4: 6 ¾ × 8″′.
CONTENT PROVIDER
International Organization for Standardization [iso]
International Organization for Standardization [iso]