Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Soviet Union - 1932 (August 26), Attempt of Flight Franz Josef Land to Arkhangelsk, cover franked by International Polar Year stamps of 50k and 1r, complete set of two, addressed to Moscow with arrival ds on reverse, VF, Est. $150-$200 , Sc. #C34-35