Major stamp auctions are stellar events and none more so than the June 14-15 sale in New York of the key items from the Bill Gross collection, the most complete of United States postage stamp ...
A one-cent postage stamp from 1868 is expected to become the most expensive U.S. stamp ever sold when it heads to auction in June. Known as the “Z-grill,” the stamp is the most-valued piece of what ...
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