That side of his head is avoided by photograpers. I did catch a view of it once and noticed scar tissue bunched up behind his left ear.
I don't know where you are headed with this but it will be interesting to see.
I am always skeptical about the substitution theories but the pictures with the light skin and other deficiencies are troubling. Add the left side of the head to the equation.
The original version had scars that were impossible to overlook. I haven't seen a current version that shows them.
The answer may be that his hair has grown out and obscures the scars. My memory makes that sound difficult but possible--better pictures; particularly earlier pictures; would help.
First place, and most significant, this issue may have more significance now than it had prior to January 20.
If Barry fails the NBC test, there is a fair amount of Constitutional Law that makes it clear his acts in office which require a President to implement are not valid--they are void. The obvious impact is on the Court itself--appointment of Sotomayer and Keagan required a President--so if Barry was not elegible, they are not on the Court and there are two new additional vacancies. In addition, a number of his other acts are subject to reconsideration.
With respect to Fred's #57, it looks pretty obvious to me that the Left ear flunks--it isn't the same left ear.
And we should be grateful to Fred for having the stock of images and other data at hand.
However Fred doesn't give us enough image here to be sure but off the cuff, the historical head at least doesn't appear to show us the scar either which could be viewed as suggesting that there are not two or three individuals involved but four to sort out.