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