History of Aviation, Rare Stamps and Postal History of the World, Part 1
Lot 41:
Description
1920 (October 26), Pioneer Flight registered cover from Danzig to Berlin (10.27) then to Copenhagen (10.29), franked by four stamps, including complete air post set, undelivered and returned to sender, F/VF, Est. $150-$200 , Sc. #C1-3
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