Lot 486
Poland, 1938, Attempted Stratospheric Balloon Flight Cover. Used with the special 75gr. purple balloon souvenir sheet issued for the flight and tied to the reverse with a black September 25th commemorative cancel. There is a red rectangular handstamp on the front of the cover that indicates the balloon was damaged and burst during inflation, thus aborting the flight. WW II broke out before another launch could be attempted. Scarce today, this is the only Eastern European stratospheric balloon flight cover released to the public.
Estimated Value $150 - 250.
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