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: $50

Buyer's premium:

1976, Christmas, 13c multicolored, right sheet margin plate imperforate block of six (2×3), control signs on the edge, full OG, NH, VF, C.v. $225 as three pairs, Est. $80- $100, Scott #1703a