History anyone recognize these mirrors?... foreign?

Got these at a swap meet back in the 70s.. always wondered who made them?they.. are about 3 1/4" in diameter......have threaded ends

 

Motorcycle maybe? Dodge?

 

If metric thread they could be aftermarket VW.

 

maybe a bathroom mirror?

 

With the screw on ends, I'd guess motorcyle. Maybe 30's-40's.

 

Are the threads imperial or metric? They have a sort of French look...

 

i have seen something like this on a vespa scooter, only recall it because i thought , man those would be cool on a hotrod

 

Threads are not metric or standard?...

 

That leaves weird English threads…

 

Bicycle?

 

There cool , simply cool !