Can You Spot The Errors? This coin looks a bit mangled, as if a car ran over it. It's really a copper cent struck on a silver dime. And no, that doesn't make it worth a nickel. The excess of metal at the top of the Lincoln cent is called a cud. It is caused when a piece breaks from the die face and leaving a hole into which the metal flows as the coin is struck. Spot the doubled die on an otherwise common dollar coin. Not all of them can be easily seen with the naked eye. In this case it is at the intersection of the Statue of Liberty's arm and the spike from her crown. An enlarged photograph inside will reveal it. It takes a keen eye to spot them, but errors on coins produced by the U.S. Mint occur every year, and they can be worth money to coin collectors. Strike It Rich with Pocket Change is THE book that shows clear, concise photos of those errors and tells what those coins are worth in today's market. Don't miss out. That cent in your pocket could be worth dollars.