History of Aviation, Rare Stamps and Postal History of the World, Part 1

United States

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Start price: $200

Buyer's premium:

1968, Waterfowl Conservation, 6c multicolored, left sheet margin block of four, imperforated horizontally between stamps, full OG, NH, VF, C.v. $500 as two pairs, Est. $300 -$400 , Sc. #1362a