Auction 90, Session 2 - Worldwide Rare Stamps and Postal History
Lot 1032:
1976, 15th Anniversary of the Yuri Gagarin Space Flight, large die proof of the stamp 50k in gray black from the souvenir sheet, size 66x110mm (close to size of souvenir sheet), full OG, NH, VF and rare proof, Est. $750 -$1,000, Sc. #4431
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