ISO 3764:2016 pdf free download.Timekeeping instruments Movements Types, dimensions and nomenclature Instruments horaires — Mouvements — Formes, dimensions et nomenclature. This ISO 3764 specifies the types and fitting dimensions of mechanical and electromechanical watch-movements. This International Standard is applicable to the five following types of movements: — Type 1: round; — Type 2: shaped round; — Type 3: round with double cutting; — Type 4: 5 ½”; — Type5:6¾x8”. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2 86-1, Geometrical product specifications (GPS) — ISO code system for tolerances on linear sizes — Part 1: Basis of tolerances, deviations and fits ISO 6426-2, Horological vocabulary — Part 2: Technical and commercial definitions 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 28 6-1 and ISO 6426-2, and the following apply. 3.1 Diameters of movements 3.1.1 casing diameter d1 diameter of a plate, or an equivalent part or an assembly unit, by which the movement…