Here is another one of my error coins, an 1810 over 09 large Cent. Only two varieties are known and the overdate is a little more expensive. A total of 1,458,500 were minted. In the middle photo you can see the 0 on both sides of the 1. Hard to capture on film with my cell but the bottom of the 9 is showing under the 0. It kind of looks like a worn die but it’s the worn curvature of the 9. Better to see in hand but it shows enough.
