The 1956 D Lincoln Wheat Penny Error Coin is a unique and collectible piece made of copper, with a red/rainbow color. Minted in Denver, this business strike coin features a rare error where the designer's initials "D" appear on the 9, and "L" on the rim. This circulated coin is from the United States and is uncertified, making it a valuable addition to any coin collection for collectors interested in errors and unique pieces.