The first known piece of mail sent using a prepaid stamp — “one of the greatest leaps forward in human communication” — could fetch between $1.5 million and $2.5 million when it comes up for auction ...
LONDON, Oct 26 (Reuters) - An example of the world's first postage stamp, the Penny Black, is being offered at auction, Sotheby's said on Tuesday, with a price estimate of up to $8.25 million. Dating ...
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