Thought this is sorta interesting. Sorry for so many pictures. Different light angles. I have 3 different light source going. One drowns out the other shot. Would a light ring be better? I can't get all to show in one picture. Opinions and comments about coin and lighting. I would sure appreciate it.
If it is incuse, then it is probably a contact mark. A RPM is raised either above the fields or above the devices or showing split serifs. (Whats a serif? The corners of the 'D', on 'S' it the ends of the mintmarks:
Thanks everyone for your comments. I was just curious about this at the end of S to where the red arrows are pointing. What do you think happened that caused this? White arrows probably nothing but they're raised.