Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Soviet Union - 1931, Zeppelin and Ice-Breaker ''Malygin'', 30k-2r, imperforated and perforated (comb 12x12½ ) complete sets of four, the last one with rough perforation as always, full OG, NH, F/VF, C.v. $687, Scott #C26-29, C3-33