I agree with
DDD on liberty as well as a light problem. When you say small cad I am sure you meant CUD. CUDs always include the rim,so what you are seeing on the shield is a very small die chip and common on shield cents.Work on filtering your light source.
John1

( I'm no pro, it's just my humble opinion )
Searched 6.5 +/- Million Cents Since 1971