Spartan Mfg was one of the companies making these horns back in the day. They started out in the radio business & expanded into horns. The horn plant was moved to southern Illinois where it finally went out of business about 15 years ago. I worked there in the 70's.
One of my good engineering friends who also worked there collected a lot of parts from the closing & does some repair work on horns as a hobby business. He is starting a small museum for Spartan horns, but he doesn't have an example of the style used on the model A's. Would anyone have a decent looking horn to sell or donate? It doesn't have to run (he can do the repair work), but he would like to find one that has decent sheetmetal & isn't all beat up. Just let me know thru a PM or at email@example.com