This 1975 Lincoln Memorial penny is a highly sought-after coin due to its rare error. The absence of a mint mark on this penny makes it a unique addition to any coin collection. Its red color adds to its overall appeal, making it a must-have for avid coin collectors. This penny has been circulated, adding to its historical value and story. While it has not been certified, its rarity speaks for itself. Don't miss out on the opportunity to own this very, very rare error coin.