What kind of horn is this?

[wrndln]

There should be an ID on the area where the bolts connect it together. Steward Warner, Ames, etc had stamping in the flat area at the bottom. If there are not 2 small rivet holes in the motor cover or a plate riveted to to it, it isn't a Sparton. If you have a copy of the Judging Standards, there is a section 19 that describes all the features of the various horned used on model A's.
Rusty Nelson