These are the most valuable stamps from around the world ... The 1851 12d Black Empress is far from the rarest Canadian stamp, but it still commands astronomical prices at auctions.

A rare Canadian stamp sold for $292,500 at an Ottawa auction last weekend. Issued more than 170 years ago in 1851, the auctioned 12-Penny Black stamp was considered to be in pristine condition ...

They tend to be rare. “They’re kind of like the ... They are a bit bigger than most of the Buy Canadian stamps, just under two inches high by two and five-eighth inches wide (five centimetres ...