Large plunger / klaxon horn possibly automobile

[bud poe]

Picked this up at Keizer, thanks @RidinRelics !
Was told it is an early automobile accessory but I’ve also seen a few mounted on teens era bicycles. Can see no makers mark yet, might be something under the paint?
Curious if anyone knows if these were also marketed to the bicycle industry or just adapted. I need to find or fabricate a mount
Seen here is mine, and a similar one mounted on another members teens HD Arch Bar

 

[Gully]

The big ones were probably adapted. Unsure what your original bracket looks like but I sent mine to @rustyspoke66 and he duplicated it to fit like a regular Klaxon. Had a couple made.

 

[bud poe]

Thanks @Gully !

Here is the bracket on mine, will be easy to make a little strap for a top tube mount