Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Russia and Soviet Union - 1931, Zeppelin North Pole Flight, Ice-Breaker ''Malygin'', 30k-2r, imperforate complete set of four, nice margins, full OG, NH, VF, C.v. $227, Est. $120-$150, Scott #C26-29