Oh have I got an odd one for you guys. The wheels on this 1965 Gran Sport were called "Road wheels" (not the "Rally wheels" people often call them) and the 1965 version was slightly different from 66 and on. We are not talking center cap and we are not talking overll structure appearance. There was a difference in manufacturing and you can see this difference with a good photo or in person up close. I can't tell in this photo if this car has the "correct" wheels on it, it is that subtle.
But tell me what the difference and why it was done.