Known as the world’s most valuable and rare stamp, this unique piece was produced during a stamp shortage in British Guiana. Only one copy is known to exist, discovered by a 12-year-old Scottish boy ...

The Smithsonian’s National Postal Museum opens its new William H. Gross Stamp Gallery to the public Sunday, Sept. 22. Named after its primary benefactor, it is the world’s largest stamp gallery and ...

24c Curtiss Jenny inverted block of four, 1918 This upside-down blue plane within a red frame is the most famous U.S. stamp and one of the world’s most famous printing errors. Only one misprinted ...

An armed escort has just transported the world's oldest stamps – the Penny Black – from London to New York. The Victorian stamp revolutionised the postal service in Britain and subsequently around the ...

The rarest stamps in the world, like the British Guiana 1c Magenta, sell for millions sometimes over $9 million because of their extreme rarity. Many of the most expensive stamps (like the Inverted ...