Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1

Worldwide Air Post Stamps and Postal History - Poland - Gordon Bennett Balloon Post

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Start price: $160

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Description

1935-39, two postcards originated from Belgium, each franked by two stamps, first one posted to the flight on September 15, 1935 with final destination in Soviet Union, uprated by definitive stamp of 4k claret and cancelled by village Veshenskaya ds; the other one – to the flight on September 3, 1939, which was cancelled because of the beginning of the WWII, uprated by Poczta Balonowa 1zl blue, mostly VF, Est. $300-$400