Original electrical trade vintage catalog for AMERICAN DISTRICT TELEGRAPH COMPANY. Executive office was located at 155 Sixth Avenue, New York City, NY. Manufacturers of Protection for fire, burglary, holdup with ADT automatic electric systems. Manufacturers, installs, maintains and operates fire and burglar alarm systems for supervision of watchmen and various industrial processes. Used in banks, plants, stores, warehouses. Disbound from a large 1964 architect construction materials book, this unique old four page technical specifications brochure would make a marvelous addition to your retro electrical security equipment library. Contains a small amount of residual glue on edge.