ISO INTERNATIONAL STANDARD 3764 Fourth edition 2016-03-01 Timekeeping instruments Movements - Types, dimensions and nomenclature Instruments horaires Mouvements Formes, dimensions et nomenclature Reference number ISO 3764:2016(E) ISO @ ISO 2016 IS0 3764:2016(E) COPYRIGHTPROTECTEDDOCUMENT @IS0 2016,Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax+4122 74909 47 [email protected] www.iso.org ii @ IS0 2016 - All rights reserved IS0 3764:2016(E) Contents Page Foreword .iv 1 Scope .1 2 Normative references .1 3 Terms and definitions. 3.1 Diameters of movements 3.2 Thickness of movements 2 3.2.1 Mechanical type 2 3.2.2 Electromechanical type 2 4 Nomenclature of movements and their dimensions 4.1 Type 1: Round movement. 2 4.2 Type 2: Shaped round movement 4 4.3 Type 3: Round movement with double cutting. 4.4 Type 4: 5 /2""'movement. 6 4.5 Type 5: 6 3/4 × 8"'movement. 1 5 Nomenclature for thickness of movements. 8 5.1 Mechanical movements. .8 5.2 Electromechanical movements with analogue display @ IS0 2016 - All rights reserved iii