Issue: Block: 20th Anniversary of Space Exploration. (Soviet Union, USSR, 1977)

Tuesday, October 4, 1977, Block: 20th Anniversary of Space Exploration.

Tuesday, October 4, 1977 Soviet Union, USSR will issue: Souvenir Sheet "Block: 20th Anniversary of Space Exploration." face value 50,

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Country:	Soviet Union, USSR
Issue:	Block: 20th Anniversary of Space Exploration.
Date:	1977-10-04
Print:	Photogravure
Perforation:	frame 11½ x 12
Emission:	Commemorative
Format:	Souvenir Sheet
Face Value:	50 Russian kopek
Print run:	500000