Schwarze Electrical Signal Devices. Catalog Number 25, Issued June 25, 1928.

Schwarze Electric Co., Adrian, Michigan

Publication: Privately printed, 1928, Adrian

Second edition. 10" x 8" bright pictorial wrappers. 64 pages, illustrations. "Fire and police alarms, schools, public buildings, hotel corridors an industrial plants, burglar alarms, traffic signals, mines, railroads and shipping wherever sound signals are used." Profusely illustrated with black and white Illustrations of various bells, buzzers, KodeKall "The Instant Locater," fire alarm systems, horns, etc. Important facts regarding bell-ringing transformers, installation data, pricing, specifications, etc. Wrappers lightly soiled else very good.