History of Aviation, Rare Stamps and Postal History of the World, Part 1
Lot 139:
1931-32, Airships, perforated 10k-1r used on six air post covers in various combinations, three addressed to Germany, two – to Czechoslovakia and one is advertising stationery envelope to Ulyanovsk, all appropriate markings, F/VF, Est. $200-$250, Sc. #C20-24
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