This seems to be convex on the obverse, can feel a raise in height if you slowly run the back of your fingernail over it. Can this happen or is something else causing this?
I think it is Progressive Indirect Die Transfer, http://www.error-ref.com/progressive-indirect-design-transfer/
I’m not sold on progressive indirect die transfer. I’m not seeing the reverse design on the obverse and vice versa. Looks more like this to me. JMHO http://www.error-ref.com/reciprocally_deformed__convexo-concavo_dies/
The eagles right wing run in front of Ike's face. Reciprocally Deformed Convexo-Concavo Dies The only known case among domestic coins is found in a production run of 2001-P half dollars.
Ok, I’m seeing it now. It looks like Ike’s chin on the reverse above the wing also. I know this is for die clashes, yet it gives perspective. http://www.maddieclashes.com/dollar-overlays/
If that is the only time it has been seen, how likely is it that this Ike has the same issue. Some sort of exaggerated clash seems more likely after seeing the overlays. I am at a loss as to what it could be. Here is the reverse under different lighting