ISO INTERNATIONAL STANDARD 3765 Second edition 1998-11-15 Timekeeping instruments - Wristwatches -- Dimensions of bracelet-to- case fastening elements Instruments horaires -Montres-bracelets -Dimensions de raccorderrient des bracelets aux boites ISO Reference number ISO 3765:1998(E) ISO 3765:1998(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 3765 was prepared by Technical Committee ISO/TC 114, Horology, Subcommittee Sc 7, Overall dimensions. This second edition cancels and replaces the first edition (IsO 3765:1976), which has been technically revised. @ISO1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic International Organization forStandardization Case postale 56.CH-1211Geneve 20.Switzerland Internet [email protected] ii ISO 3765:1998(E) INTERNATIONALSTANDARD ISO Timekeeping instruments Wristwatches Dimensions of bracelet-to-case fastening elements 1 Scope This International Standard specifies the dimensions for fixing a bracelet to a wristwatch-case with the use of spring bars. This International Standard is applicable to wristwatch cases of two types and spring bars of three types. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to registers of currently valid International Standards. IsO 286-1:1988, IsO system of limits and fits - Part 1: Bases of tolerances, deviations and fits Iso 6426-2:1984, Horological vocabulary—Part 2: Technico-commercial definitions. 3 Definitions For the purposes of this International Standard, the definitions given in IsO 6426-2 and the following apply. 3.1 case protective jacket in which a watch-movement is mounted 3.2 lug part of a case with a hole to which a bracelet is fastened with a spring bar 3.3 springbar unit containing a spring and used for fastening a bracelet to a case 4 Classification 4.1 Wristwatch-cases Wristwatch-cases are classified into two types: Type 1: case with two lugs arranged on two sides of a case; a bracelet is fastened between these lugs by the use of spring bars (figures 1 and 2);