Hey guys I wanted to get your opinion on this, I've never ran across one of these and it doesn't appear to be a PMD and I'm sure you guys maybe have seen this before I appreciate it thanks.
It looks like someone shot it with a BB gun (with the coin against a hard surface) or used some sort of punch and hammer to cause the damage. It's PMD! Chris
Could these possibly be Rockwell test marks? Just read about this for the first time. http://www.error-ref.com/rockwell-test-mark-in-planchet/
If it was a test mark there would be no damage to the other side due to the fact that they test a planchet not a stamped coin.