Oops! One-of-a-kind U.S. Mint Errors-a rare and limited treasure! The U.S. Mint uses state-of-the art equipment and quality-control techniques to produce billions of coins each year. Only a very small percentage of coins are mis-struck and allowed into general circulation. Rare U.S. Mint errors are aggressively sought by collectors. The Off Centered Dime is one of those errors. A Certificate of Authenticity is included.