Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Russia and Soviet Union - 1922-32, red Airplane overprint, set of Fokker F.III with later surcharges, the Hague Air Post Conference, Zeppelin issue of 1930 (perf 12½) and International Polar Year, six complete issues, the total is 15 stamps, all with full OG, NH, VF, C.v. $715, Est. $300-$350, Scott #C1/C35