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: $400

Buyer's premium:

1971, John Sloan, Artist, 8c multicolored, top right corner sheet margin plate No.33131, block of four, right stamps has red engraved color missing (John Sloan and ”8”) due to significant shift of all engraved colors to the bottom left, full OG, NH, VF, US Errors Cat. evaluates this error as rare, C.v. $2,000 as two single stamps, Est. $750-$800, Scott #1433b