I saw this picture and ask the owner what this rearview mirror this was from. He didn't know. I would like to try one in my roadster.
After really looking at it, the mounts probably be too goofy and the mirror stem looks too long. It ALMOST looks like a 35-36 FORD mirror with the stem bent straight. Went and looked in the FORD and it looks very close with a "wee bit" of work. Good luck on your search....Mitch.