There was mirror slant at Love Field before the motorcade began that equals that in the Parkland picture.
Thanks for posting these Jerry. Where did you find that Love Field photo? I have been searching for that kind of view from Love Field.
I don't necessarily agree that the mirror hasn't moved between Altgens #6 and Altgens #7. But your photos do show that the windshield frame damage was not there at Love Field:
Here is the detail of the damage at Parkland:
But the same location shows no damage at Love Field prior to the motorcade departing:
That certainly rebuts the suggestion made by SA Gies in the Rowley letter that the damage may have occurred before Nov 22/63!