NA 027
DIN Standards Committee Optics and Precision Mechanics
Pre-standard
[Withdrawn]
ISO/TS 18684
ISO/TS 18684
Timekeeping instruments - Watch external parts made of hard materials - General requirements and test methods
Title (German)
Zeitmessgeräte - Externe Uhrenteile aus Hartmetall - Allgemeine Anforderungen und Prüfverfahren