Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Russia and Soviet Union - 1931-32, Airships, imperforate and perforated complete sets of five and seven, the last one includes 20k of pale red shade and engraved 15k (perf 12), all with full OG, NH, VF, C.v. $707, Est. $300-$350 , Scott #C15-C24, C22a, C25