If you have any Wisconsin State Quarters, you should look at them carefully. Some of them have been minted incorrectly and they are valuable to the right collector.
Click Here for images and a description of the error.
I’m thinking of looking through my quarters looking for one; maybe I can get lucky like one guy I know and sell it on e-bay for 130 dollars.
Going to show this to your dad. I know he will be checking his quarters too. 🙂