Demo man,...That's probly a Jubilee no.90 cow caller. Usually red, mounted with the bell on top and the trumpet turned down and out 90 degrees. Had a lever mounted to the bell to attach to a push/pull cable and a lever mounted in the cab. With just a horn button it's not very impressive, but if you actuate the lever it can get pretty loud. Supposed to sound like a bull. You can get both a 6volt and 12volt version.
