Bidspirit auction | Worldwide Air Post Stamps and
Worldwide Air Post Stamps and Postal History - Soviet Union - 1933, Stratostat ''U.S.S.R. 1'', 5k, 10k and 20k, complete set of three, full OG, NH, VF, C.v. $463, Est. $300-$350 , Scott #C37-39
Worldwide Air Post Stamps and Postal History - Soviet Union - 1933, Stratostat ''U.S.S.R. 1'', 5k, 10k and 20k, complete set of three, full OG, NH, VF, C.v. $463, Est. $300-$350 , Scott #C37-39