BS 870 - External Micrometers, has been superseded (but remains current and obsolescent) by BS EN ISO 3611:2010 - Geometrical Product Specifications (GPS) - Dimensional Measuring Equipment: Micrometers for External Measurements - Design and Metrological Characteristics.
Origin
Unknown
Journal Title
Bsi News Release May 2011
Sector
News Items
Class
N 2666a