This is a Autolight 22" Electric  Trumpet Style Car Horn Vintage. Part number HO 4007.

Working Antique Vintage Trumpet  Electric Car Horn. 22 inches long with a 4 1/2" inch trumpet opening. As you can see paint looks scratches a ding or two looks great for it's age.Might have to be adjusted after shipping.Please check the pics carefully SHIPS USA ADDRESSES ONLY