Excluding the decade from 1966 to 1976, $2 bills have been printed uninterruptedly since the Civil War. Yet, the average American who doesn't handle cash for a living can go years without seeing one. While the $2 note is still in circulation and the Bureau of Engraving and Printing recognizes it as legal tender—it is considered to be the rarest currency denomination in the U.S.
2 US Dollar
From GeorgeB received on 27/3/19. Thank you!