Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
From the picture it looks like someone used the stock mounts and bolted on a truck or tailor towing mirror. That is definitely a cob job. There were a couple of bolt on side mirrors, but none looked like that. By the way you might want to take care of that rust around the mounts soon if it's not already too late to stop the rust. Remove the mirrors and window to get at both sides of the skin.
Good luck,
>-
One of the styles pictured below. The other had the same mount with a squarer mirror profile.