Bidspirit auction | Worldwide Air Post Stamps and

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