Errors in some circulated nickels were found recently by a Florida coin collector. The message here is that when cherry-picking coins, not only should one look for the brilliant uncirculated but also for errors. These errors happen to be in Jefferson nickels, which are his pendchant, and fortunately for him. One good find was a 1996-P Jefferson nickel which was struck twice.
Resourse: Numismatic News July 22, 2008.