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

United States - Modern Errors

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Start price: $300

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1971, John Sloan, Painter, 8c multicolored, right sheet margin (USPS message) horizontal pair, right stamp 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, Datz evaluates this error as rare, C.v. $1,000, Est. $500-$600, Sc. #1433b