The envelope was sent twice: once on May 2, 1840, and again on May 4, 1840. Sotheby's The first known piece of mail sent with a prepaid, adhesive stamp could sell for as much as $2.5 million.

Here’s how it works. The first and only envelope to be postmarked on the surface of the moon is now on display as part of the world's largest postage stamp gallery. The Smithsonian opened its ...

Sotheby’s is selling the first posted envelope to use a prepaid ... Communicating by mail was a complex undertaking before the stamp’s invention because the recipient was required to pay ...

The Mulready, named after designer William Mulready, itself acted as a pre-paid envelope, whilst the Penny Black was the world's first adhesive postage stamp. Both methods were an important new ...