1993GOST 24907-1993 Revolts counters and units counters. Specifications. Testing methods
1981GOST 24907-1981 Mechanical and electromechanical counters. General specifications
GOST R 50413-1992 Revolts counters and units counters. Specifications. Testing methods has been changed from GOST 24907-1981 Mechanical and electromechanical counters. General specifications.