1960-D Error or Damage?

[Steven]

I have learned more in the past few days about coins here on this site, than in my whole life

In the starting post of this thread you were concetrating, it appears, on just the die chip in the date. It's good to remember even if you find one anomoly on a coin doesn't mean that there are not others. Look the entire coin over and you may just be surprised at what you may find. As Greg suggested possibly die clashes. I have gone through my inventory several times and always find something that I have missed previously. This is why I suggested photos of the MM. Hopefully you can put a number to the RPM.

Happy searching