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: $150

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1974, Horses Rounding Turn, 10c yellow and multi, right sheet margin single with blue ”Horse Racing” omitted, in addition red color (US Postage 10 cents) shifted to the top, full OG, NH, VF, C.v. $650++, Est. $250-$300 , Sc. #1528a