commemorative coin of the ussr. 130th anniversary of the birth of k.e. tsiolkovsky. russian and soviet scientist who developed

jubilee coin ussr tsiolkovsky kaluga 130 years old birthday poet thinker writer statesman soviet union russia release date august 1987 copper nickel alloy anniversary one ruble collection numismatics rarity commemorative ussr 130th birth tsiolkovsky russian scientist developed theoretical questions cosmonautics issue: 1987 copper-nickel