Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1

United States - Modern Errors and Varieties

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Start price: $800

Buyer's premium:

1989, Ernest Hemingway, imperforate proof of 25c multicolored in block of four with horizontal gutter, very slight fold along the gutter, otherwise perfect quality, full OG, NH, VF and scarce, C.v. $4,000 as two pairs, Scott #2418