Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 13:
1931 (October 16), Air Post Exhibition in Antwerp, four Air Post covers sent from Exhibition to Paris, London, Amsterdam and Malmö, each one bearing specially overprinted for each city semi-official stamp of 50c blue along with appropriate franking, confirmation markings, labels and arrival ds, VF, Est. $250-$300, Sc. #C1-2
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