GOST 577-1968 Clock-type dial indicators graduated in unit divisions of 0,01 mm. Specifications
GOST 8.051-1981 State system for ensuring the uniformity measurements. Permissible errors of measurement of linear dimensions to 500 mm*, 1981-04-19 Update
ISO 1858:1977 Information processing; General purpose hubs and reels, with 76 mm (3 in) centrehole, for magnetic tape used in interchange instrumentation applications*, 1977-02-01 Update
GOST 21717-1976 history
1977GOST 12796-1977 Hubs for magnetic tape with a nominal width of 6,25 mm. Specifications