Original 1948 door trade vintage catalog for the ALERT ELECTRIC DOOR CONTROL COMPANY. Main office and plant was located at 306 East Washington Blvd, Los Angeles, CA. 

Manufacturers of Self Contained Oil Hydraulic Operators.

Products include Garage Doors, Entrance Gates and Special Doors.  Residential, Commercial and Industrial.

Twenty-one years experience in automatic operator - electrical, mechanical, pneumatic, water hydraulic, has lead to the development of the self-contained oil hydraulic operator.  

Has product image, illustration, description, application and specifications provide product details.

Unbound from a large rare 1947-1948 Catalog File, this unique old one-page technical brochure would display beautifully matted and framed. Nice graphics. A fabulous addition to your retro construction industry library.