(n) :
(coin collecting) A type of error coin in which one side of the coin has the normal design and the other side has a mirror image of the same design impressed upon it due to being struck by a die cap.
(n) :
(coin collecting) A type of error coin in which one side of the coin has the normal design and the other side has a mirror image of the same design impressed upon it due to being struck by a die cap.