One mirror base has been modified. As you can see in pictures 5 and 6, one has a smaller hole in the front. These mirrors were made with two different mounting styles. One that could be screwed directly with two screws into the cars door or fender.
The other style had a mounting bracket that attached to the back hole. Perhaps the modified base could accept a larger hole drilled into the base to seat the screw head. No mounting gaskets or screws. Please see all 12 pictures. The item "(2) NOS Vintage 1950's 1960's SUPERSITE VANGUARD Mirrors" is in sale since Monday, July 12, 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.