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Precious US stamp from 1868 expected to sell for eye-popping sum: 'Rarest of the rare'
Auction house Director Charles Shreve called Gross' collection, "without question, the most significant and most valuable collection of United States ... stamp – the rarest of the rare, the best ...
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The Story Behind World's Most Valuable $5 Million Rare Stamp Auction
In June, the Robert A. Siegel Auction Galleries in New York will host an auction featuring the most valuable U.S. postage ...