Bidspirit auction | Soviet Union Collection of Sheets

Soviet Union Collection of Sheets and Large Blocks - 1959, 100th Anniversary of the birth of Aleksandr Popov, Radio Pioneer, 40k and 60k, two complete sheets of 100 (10x10), some marginal flaws, folded once along vertical perforation, full OG, NH, VF, SC.v. 12,000P , Sc. #2179-80