BS IS0 18684:2020 BSl Standards Publication Timekeeping instruments Watch external parts made of hard material General requirements and test methods bsi. BSIS018684:2020 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0 18684:2020. It supersedes PD IS0/TS 18684:2015, which is withdrawn. TheUKparticipationinitspreparation was entrustedtoTechnical Committee STI/53, Specifications and test methods for jewellery and horology. A list oforganizations represented on this committee can be obtained on requestto its secretary. This publication does not purport to include all the necessary provisions ofa contract.Users areresponsibleforits correct application. @TheBritish Standards Institution2020 Published by BSI Standards Limited 2020 ISBN9780580945212 ICS39.040.10 Compliance with a British Standard cannot confer immunityfrom legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29February 2020. Amendments/corrigendaissuedsincepublication Date Text affected BSISO18684:2020 ISO INTERNATIONAL STANDARD 18684 First edition 2020-02-10 Timekeeping instruments Watch external parts made of hard material General requirements and - test methods Instrumentshoraires-Habillagesdemontreenmateriauxdurs- Exigencesgénérales etmethodes d'essais Reference number IS0 18684:2020(E) ISO @IS02020