The rarest US stamp is going up for auction. It’s expected to sell for millions
By Harmeet Kaur, CNN (CNN) — Here’s something for serious stamp collectors only. This summer, philatelists will have a chance to snag the rarest US stamp ever: the 1868 one-cent “Z-grill.” Interested? It’ll cost you (more than) a pretty penny. On June 14, the one-cent Z-grill will be put up for sale by Robert A.
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