Watch List notes:

RUSSIA, Union of Soviet Socialist Republics. 1923-1991. 150 Roubles (Platinum, 28 mm, 15.52 g, 12 h), celebrating the XXII Summer Olympics held in Moscow, Leningrad (Saint Petersburg), dated 1978 and 1980. Emblem of the Soviet Union above denomination. Rev. Discus thrower with Olympic symbol to right. Friedberg 183. KM (Y) 163. FDC.