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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1993, American Musicals, 29c x4 multicolored, top margin imperforated proof se-tenant booklet pane of four, plate No.A11111 on selvage, full OG, NH, VF and very scarce, C.v. $1,250, Est. $500-$600 , Sc. #2770a P