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 and perforated (comb 12x12½), complete sets of four, full OG, NH, VF, C.v. $687, Est. $300-$350 , Scott #C26-29, C30-33