Dearborn, a lot of these BU cents are overly abraded. I think those are the lines you're seeing.
Best Find - 1976 D WQ DDO-001 http://goccf.com/t/382777
Interesting find - 1947 S over inverted S http://goccf.com/t/368005
Interesting find - 1947 S over inverted S http://goccf.com/t/368005