Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1

United States - Modern Errors

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Start price: $200

Buyer's premium:

1988, Antarctic Explorers, 25c x4 multi, right sheet margin se-tenant block of four with black (engraved) color omitted, control markings on the edge, full OG, NH, VF, C.v. $750, Est. $300-$400 , Sc. #2389b