Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3

Poland - Air Post stamps

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Start price: $75

Buyer's premium:

1946, Airplane Douglas over Warsaw, 5zl greenish black, top sheet margin imperforated single, full OG, NH, VF, F. Kessler guarantee hs along with two others, Est. $100-$150, Sc. # C13 imp