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

United States - Modern Errors and Varieties

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Start price: $200

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1980, Architecture, 15c x4 black and red, top right corner sheet margin se-tenant block of four, upper stamps (No.1838-39) with missing red color due to strong perforation shift, plate No.39429 on UR stamp, lower stamps with red text at top instead of bottom, full OG, NH, VF and rare, C.v. $400++, Scott #1841b