Thank you all for your replies. As stated in the OP I was quite sure this was
PMD, was really looking for some ideas on what event might have caused the damage to the coin. Note how the coin shows four different shelves, each being circular in shape. The first shelf being the well struck portion of the coin, the second and third shelves still show some detail, IB in liberty, The curvature of the back of Lincolns head as well as some hair detail. I am just trying to get a grasp on what might have happened to cause this sort of damage. Any thoughts on this would be greatly appreciated.
Here is a slightly better pic of the obverse.
