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

France

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Start price: $150

Buyer's premium:

1937, Port du Gard, 20fr orange brown, type III (Yvert type IIB) in block of ten (5×2) used together with four other values (3 with perfins) on air mail cover from Paris to Tonkin (Hanoi), postmarked on arrival, some creases, still F/VF and scarce franking, Est. $250-$300, Scott #254A