The phrase "Double Die" usually refers to improperly minted coins.

When a coin is minted, it is struck with what is referred as a "Die." The die is the actual image to be imprinted on the coin, and is contained in the molds at each of the mints. A Double Die coin is an error in which the coin is actually struck twice with the Die. In most cases, the coin displays a duplicate image with one slightly off-center. It looks sort of like an echo, or a blur.

Double Die strikes happen very rarely, and as a result, the double die coins are equally rare.

The most famous double dies are the 1955 and 1972 United States double die pennies.

United States Coinage

Log in or registerto write something here or to contact authors.