Auction 90, Session 2 - Worldwide Rare Stamps and Postal History

Soviet Union Stamps of 1941-91

The auction will start in __ days and __ hours

Start price: $500

Buyer's premium:

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