The '50-54 Chevy business coupe is their natural habitat.
When you try to put them on a VW Beetle you find there is a 90 degree flange on the door frame that needs to be cut away. Look how far away swan neck mirrors are:
https://i.ebayimg.com/images/g/zdIAA...8xL/s-l300.jpg
[Patent Leather shoes are like a convex mirror]