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: $1,500

Buyer's premium:

1989, 100th Anniversary of the Montana Statehood, imperforate 5 stage proofs of 25c in blocks of four, mounted on large USPS page with inscription of colors, fresh, VF and extremely rare, only a few such pages were produced for presentation purposes, Est. $3,000-$4,000, Scott #241