In it, Homer Simpson is seen looking at a sheet of Inverted Jennys while at a yard sale ... Charles Hack bought the stamp at auction in New York The stamp's value skyrocketed almost instantly ...

The first stamp was created in Great Britain on May 1, 1840. It wouldn't take long for people to start collecting them. Just one year later, a woman placed an ad in the London Times seeking ...

An upside down ship makes this commemorative stamp one of the most famous and valuable American postal errors of all. Find ...