These are very rare, 1950's and 1960's, Supersite Site-Master fender mounted rearview mirrors that have been re-chromed. Only one of the mirror heads were not re-chromed. One has the original tinted, non-glare mirror glass, the other one has a new non-glare glass mirror. The base as well as the head adjust to your desired position. Screw holes are three inches apart.
The last picture is a page out of my SuperSite catalog. It gives you more information on this Site-Master mirror. Please take a good look at all 12 pictures. The item "Re-Chromed 1950's 1960's SUPERSITE SITE-MASTER Outside Rearview Mirrors" is in sale since Sunday, January 10, 2021.
This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Exterior\Mirrors". The seller is "kittie_minnie" and is located in Lewisville, Texas.This item can be shipped worldwide.