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

Worldwide Air Post Stamps and Postal History - United States

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Start price: $150

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1989, 20th UPU Congress, Futuristic Mail Delivery, 45c multicolored, top right corner sheet margin se-tenant block of four with ZIP imprint, light blue (engraved) color omitted, full OG, NH, VF, C.v. $475, Scott #C125b