ISO INTERNATIONAL STANDARD 10552 Third edition 2014-10-01 Timekeeping instruments Crowns and sealed tubes Designs and dimensions Instruments horairesCouronnes ettubes étanches-Constructions etdimensions Reference number IS0 10552:2014(E) ISO @ IS0 2014 IS0 10552:2014(E) COPYRIGHTPROTECTED DOCUMENT @IS02014 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 Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 4122 74909 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved IS0 10552:2014(E) Contents Page Foreword .iv 1 Scope. ..1 2 Normativereferences ..1 3 Terms and definitions ...1 4 Symbols 4.1 Crowns .1 4.2 Sealedtubes 2 5 Crowns and sealed tubes - Designs and dimensions .2 5.1 Crowns with one gasket 2 5.2 Sealed tubes. .2 6 Designations 3 .sn.?a1...lrightsreserved iii