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 ...
This 1-Cent Z Grill from 1868 is one of the rarest U.S. postage stamps in history Robert A. Siegel Auction Galleries A 1-cent postage stamp from 1868 is up for auction and could fetch up to $5 million ...
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