Below you can find the The old lincoln penny had one ear of lincoln's on the front & 2 ears of this grain on the back Jeopardy Words Answer. The answer to The old lincoln penny had one ear of lincoln's on the front & 2 ears of this grain on the back has 5 letters. This clue belongs to the Old u.s. coins category and is part of Jeopardy Word Level 1712. If you scroll near the bottom you will find other clues and answers part of level 1712