Horology. Procedure for evaluating the accuracy of quartz watches not-for-sale are therefore requested to refer

are therefore requested to refer to ISO 6360 in their catalogues

and gives examples for the determination of percentage of imperfections

Reference model and test point

IEC 61951-1

Horology. Procedure for evaluating the accuracy of quartz watches not-for-sale are therefore requested to referWhat is this standard about? This document specifies the procedure for evaluating the accuracy of quartz watches, individually and by lots, and the relationship between the accuracy tested and the accuracy classification given by the manufacturer. It applies to quartz watches having accompanying documents on which the accuracy classification is indicated.