A mystery item here. All I know is that it is French, stylish in a quirky manner and slightly crazy. Is it from a bicycle or a moped / autocycle? It appears to mount on the handlebar stem. I'm guessing the age is thirties, forties or perhaps early fifties. I do not really have anything suitable to fit this light to but it is the kind of item that makes me feel the urge to build up a two wheeler around it!
Can anyone out there assist with further information?