The 1943 penny errors represent some of the most fascinating and valuable mistakes in American numismatics. During World War II, the U.S. Mint switched from copper to ...

Accurate identification is crucial for coin collectors who want to distinguish valuable errors from common damage. A coin that looks unusual might be worth hundreds of dollars—or just face value.

Add Yahoo as a preferred source to see more of our stories on Google. Peter Gudella via Shutterstock Minting coins isn't exactly an exact science. Even though most ...