State Emblem of the Soviet Union
The State Emblem of the Soviet Union was the official symbol of the Union of Soviet Socialist Republics adopted in 1923 and used until the dissolution of the state in 1991. Although it technically is an emblem rather than a coat of arms, since it does not follow traditional heraldic rules, in Russian it is called герб (gerb), the word used for a traditional coat of arms.
Source: Wikipedia — State Emblem of the Soviet Union (CC BY-SA 4.0)