The only known stamp of its kind, the Alexandria Blue Boy is a circular blue stamp issued in 1847 or 1846 (it’s said to have been used as postage ... in existence (only 100 were ever printed), but the ...

The first stamp ... one of the most famous stamps in all philately. There are at least 86 known in existence (only 100 were ever printed), but the one sold in 2018 is the most expensive because ...

The stamp contains the ‘Post Office’ instead of ‘Post Paid’. It was sold for a whopping $11.94 million in 2021. British Guiana 1c magenta Issued in 1856 in British Guiana, this is considered the most ...

The stamp, seen here with Siegel Auctions President Scott Trepel, once famously featured in an episode of the Simpsons A rare US postage stamp ... sheet of 100. The one most recently sold is ...