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: $350

Buyer's premium:

1991, 700th Anniversary of Switzerland, 50c multicolored, right margin vertical pair imperforated horizontally, full OG, NH, VF and scarce, C.v. $1,400, Est. $600-$700, Scott #2532a