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: $300

Buyer's premium:

1987, Pan American Games, (22c) multicolored, top left corner sheet margin plate No.1111 block of four with silver color omitted, usual centering, full OG, NH and probably unique positional piece, C.v. $2,200 as singles, Est. $600 -$700, Scott #2247a