Here is a composite shot. The larger painted aftermarket (Delbar brand) behind are mounted to the truck and the smaller (Ford?) is in front.
I bought them at our last swap meet from a guy who had them on his Early Bronco and who'd bought them years before from another guy that had them on his Early Bronco. They appear to have the factory style mounting pads and are perfectly angled for a Bronco. They may have been bent to fit (like I had to do on the Delbars) from another model, but they were a good fit.
The main reason I bought them was because the right side mirror is a wide angle. Back when I bought my Delbars in the mid-'80's they did not offer a wide angle passenger side model. A few years later they did, so I got a set for my '79.
View attachment 876711
As you can see, they're only a little bit smaller than the full-size models. Both the arm and the head are smaller.
A nice bonus as far as I was concerned was that they are the early style head with a more squared-off look. The newer ones like you saw from the factory were more rounded on the front face and though probably more "aerodynamic" on paper, don't appeal to my eye at all compared to the older style.
Paul