Original electrical trade vintage catalog for SCHWARZE ELECTRIC COMPANY, was located in Adrian, MI. Manufacturers of Sound Signals, Bells and Buzz. Specialized and General Service Bells, Horns, Sirens, Buzzers, Kode-Kall, Vibrating Bells, Double Gongs. Type 18, 60 Horn, Megaphone and Weatherproof. Disbound from a large 1931 electrical construction materials book, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library. Slight damp stain on outer edge.