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

BS 4371 guidelines provide you with specifications for manufacturing fibrous gland packings of different materials

from small to multinational

lung impairment

Requirements as to gas insulated switchgear have been added

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.