Today I want to share my experience in commemorative USSR coins. Here will be descriptions of all USSR commemorative 1 rouble coins in 1978-1982 years.

1978

1 rouble
   Games of the 22nd Olympiad in Moscow (Moscow Cremlin).
   Diameter: 3.1 cm, circulation: 7 000 000.

1979

1 rouble
   Games of the 22nd Olympiad in Moscow (MSU building).
   Diameter: 3.1 cm, circulation: 5 000 000.

   Games of the 22nd Olympiad in Moscow (Monument "To the Conquerors of Space").
   Diameter: 3.1 cm, circulation: 5 000 000.

1980

1 rouble
   Games of the 22nd Olympiad in Moscow (Moscow Soviet building, monument to Yury Dolgoruky).
   Diameter: 3.1 cm, circulation: 5 000 000.

   Games of the 22nd Olympiad in Moscow (Olympic Torch in Moscow).
   Diameter: 3.1 cm, circulation: 5 000 000.

1981

1 rouble
   20th anniv. of the first human flight into space (USSR citizen Yuri Gagarin).
   Diameter: 3.1 cm, circulation: 4 000 000.

   Friendship for ever (Soviet-Bulgarian friendship).
   Diameter: 3.1 cm, circulation: 2 000 000.

1982

1 rouble
   60th anniv. of the formation of the USSR.
   Diameter: 3.1 cm, circulation: 2 000 000.