SCOTT TREPEL: Well, the stamp that we sold for $2 million is the Inverted Jenny, and it is the icon of stamp collecting. ... TREPEL: There's still one stamp out there that was stolen in the 1950s.

While there are still other inverted Jenny stamps floating out there (one was stolen in the 1950s and has yet to resurface), Trepel says that this recently-sold one, named "Position 49" for its ...