Worldwide Air Post Stamps and Postal History Poland
Sale No: 93
Lot No:123
Symbol:*C
Cat No:Sc. #B31
1938, Attempt of Stratosphere Flight by Major Burzynski and Professor Jadko-Narkiewicz, two souvenir sheets of different shades (one is defected) and three Balloon postcards, two of which with cancelled souvenir sheets, mostly F/VF, Est. $150-$200 (Image)