With the marks on the ear area, to me it looks more like die polishing that the machine dipped into the void for the bust. When the sub devices are affected on the die, it will leave a polished off void. The void will look like a slight raised on the coin. Not
Machine Doubling, as nothing is moved on that area. (MD causes the contour to be pushed aside. But what ever happened it was a die event, not a die variety that caused the issue.