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

AUCTION HOUSE WITHDRAWS SALE OF BULLET FROM KILLER’S GUN The significance of the stamp may not be obvious to someone who doesn't study philately, which is the study and collection of stamps.

The Inverted Jenny stamp was part of a collection made to mark the start ... looking at a sheet of Inverted Jennys while at a yard sale. "The airplane's upside down," he says, before throwing ...