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

United States - Modern Errors

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Start price: $75

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1978, Wildlife Conservation, Owls, 15c x4 multi, top margin se-tenant block of four, black and brown engraved colors strongly shifted to the left, full OG, NH, VF and a spectacular item, Sc. # 1763a var