Untitled Document1983, Russia (USSR). Proof Copper-Nickel Rouble “Karl Marx” CoinMint Year: 1983Reference: KM-191.1. Denomination: 1 Rouble – Death of Carl Marx CentennialMaterial: Copper-NickelDiameter: 31mm Weight: 12,8gm The Soviet Union, officially the Union of Soviet Socialist Republics (USSR), was a transcontinental country that spanned much of Eurasia from 1922 to 1991. The country wa ...