1977, Russia (USSR). Rouble Coin.Mint Year: 1977 Reference: KM-143.1. Denomination: Rouble - 60th Anniversary of the Great October Revolution. Material: Copper-NickelDiameter: 31mmWeight: 12.8gm The Russian Revolution was a period of political and social change in the Russian Empire, starting in 1917. This period saw Russia abolish its monarchy and adopt a socialist form of government foll ...