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: $75

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1981, Edna St. Vincent Millay, 18c multicolored, two single stamps with sheet margin and plate No.11111 at bottom or top, one with black (engraved) color omitted, the other one has black engraved color shifted to the right, full OG, NH, C.v. $200 for stamp with omitted color, Est. $100-$150, Sc. #1926a, var