Union of Soviet Socialist Republics (USSR); Workers' and Peasants' Red Army (WPRA); rank insignia of the ground forces as to order of the revolutionary military soviet of the USSR Nr. 116 from October 16, 1919; here small collar patch, worn from 1919 to 1924: 
Commander regiment (komandir polka – short: kompolka), comparable to NATO OR-5.
Own work