Original 1939 electrical trade vintage catalog for the AMERICAN DISTRICT TELEGRAPH COMPANY. (ADT) Main office was located at 155 Sixth Avenue, New York, NY.

Manufacturers of Electric Signaling Systems and Central Station Protection, both are fully featured.

Has product images, description, applications and specifications to provide product details.

Unbound from a large rare 1939 Process Industries Catalog, this unique old one-page technical brochure would display beautifully matted and framed. Nice graphics. A fabulous addition to your retro electrical library.