Horology. Functional and non-functional jewels Ingestion-build-232773 NOTE: This standard is applicable

NOTE: This standard is applicable to finger protection devices fitted to side hung and pivoted doors with single or double swing

Requirements as to gas insulated switchgear have been added

5AlAs (CW626N)

flow gauges

apparatus including full face mask or mouthpiece

Horology. Functional and non-functional jewels Ingestion-build-232773 NOTE: This standard is applicable1 Scope This International Standard specifies the technical definitions of functional and non functional horological movement jewels. It describes the different types of jewels used, and how this is to be marked on a timekeeping instrument or used in advertising.