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: $150

Buyer's premium:

1984, Smokey Bear, 20c multicolored, bottom left corner sheet margin ZIP block of six (2×3), imperforate between top and middle stamps and at the bottom, full OG, NH, VF and scarce positional piece, C.v. $300 for two pairs imperforate between stamps, Scott #2096b, var