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: $600

Buyer's premium:

1993, National Postal Museum, (29c) multicolored, bottom right corner sheet margin plate No.551511 se-tenant block of four, maroon and black (engraved) colors omitted (country name, denomination and background text or pictures), full OG, NH, VF and, a common plate No.111111 block is included, C.v. $2,500, Est. $1,000-$1,200, Sc. #2782b