In 1959, the U.S. Mint changed the reverse design of the Lincoln cent from a wheat reverse to a new memorial reverse. As a result, all Lincoln cents dated 1959-2008 should have a memorial reverse design.In 1986, a retired police officer named Leon Baller announced that he bought a 1959-D Lincoln cent with a wheat reverse design. This type of coin is referred to as a "Mule," since all 1959 cents should have a memorial reverse design. Baller claims he purchased the coin for $1,500.In 1987, Baller