This is a rare piece of early crime prevention history and a piece that would really stand out in your man cave. When complete, this piece was an early building alarm. Missing are the guts and bell alarm system. Invented and produced in the 1930’s by Gustav Schwartz Schwartz. Hailed from Chicago which explains why the piece resembles the Chicago Police badge. Made of heavy cast iron. Don’t let this one get a. It has a yellow coating underneath.