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

United States

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Start price: $120

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1923, Grant, 8c olive green, right sheet margin plate No.16450 block of six, full OG, top right stamp is LH, all others – NH, VF, C.v. $575, Est. $200-$240 , Sc. #560