90.20 Standard under periodical review Jan 15, 2024
ISO
ISO/TC 114 Horology
International Standard
39.040.01 Horology in general
Published
Lays down the definition and designations (as a symbol or by words) of test position for any timekeeping instrument, irrespective of its type, design or dimensions.
PUBLISHED
ISO 3158:1976
90.20
Standard under periodical review
Jan 15, 2024