Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - RSFSR and Soviet Union - 1932, Airship over the Dnieper Dam, two stamps of 15k gray black, engraved printing, perforation 10½ (cancelled) and 14 (OG, previously hinged), both are VF, C.v. $153, Scott #C25a, b