The World's First Postage Stamp Could Reach $8.25 Million at

This particular 1840 Penny Black is the world’s first postage stamp. It is expected to fetch up to $8.25 million at Sotheby's in December.

From penny post to $8 million as world's first stamp heads for

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From penny post to $8 million as world's first stamp heads for

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World's First Postage Stamp Goes Up for Auction

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Once Worth 1 Cent, the World's First Postage Stamp Could Fetch

The 1840 Penny Black National Postal Museum

Penny Black: 'First' piece of mail sent using a stamp could fetch

This ultra-rare stamp is expected to sell for over €7.07 million