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 1/2'";
— Type 4: 6 3/4 × 8'".
ISO 3764:2000 Referenced Document
ISO 286-1 Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 1: Basis of tolerances, deviations and fits; Technical Corrigendum 1*, 2013-08-01 Update
ISO 6426-2 Horological vocabulary - Part 2: Technical and commercial definitions; Technical Corrigendum 1*, 2003-04-01 Update