Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Russia and Soviet Union - 1931, Airship over the Arctic Region, 50k dark brown, comb perforation 10½x12, right sheet margin single with double impression of the design, nice and post office fresh, full OG, NH, VF and very rare, only a handful exists, this stamp is definitely the best preserved example, Raritan Stamps guarantee, Est. $5,000-$6,000, Scott #C23 var