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:

1991, 700th Anniversary of Switzerland, joint issue, 50c multicolored, imperforate block of four, full OG, NH, VF and rare multiple, which is considered to be from a printer’s waste, catalogued $400 in the Scott Errors Cat., Est. $300-$350, Scott #2532 imp