Picked up a brass horn in my journies today. Any idea what it may have come off of? It is similar to an early Model T horn.
1912 or later medium priced car such a Maxwell, Buick, or Studebaker. In mid 1912 Buick and a lot of other cars went from brass trim to nickel trim some models had their brass painted black to ease the maintenance but some folks remove the black paint from the brass and polish it off for bling in today's world.
The car below is our 1912 Buick we got for $500 in 1958. It's horn looks a lot like yours but without the black paint. I polished off the black paint in 1958. It sounds like a love sick bull frog with a cold. The Corcoran lamps are black and brass because the shells and buckets are made of steel and only the trim was brass in 1912.
Looking at the mounting bracket I think that it was for a righthand drive car.