Original door trade vintage catalog for SECURITY FIRE DOOR COMPANY, was located at 3036-3048 Lambdin Avenue, St. Louis, MO. Manufacturers of Fireproof Freight Elevator Doors and Counterbalanced Truckable, with metal clad, corrugated, kalamein or steel plate panels. Uni-Motor Electric Operators, Security Dumbwaiter doors, Sec-Tel, Horifold warehouse doors, Ver-Tel two section slideup door for exterior warehouse. Aerial view of Philadelphia showing some prominent buildings equipped with security doors. New Philadelphia Post Office, Railroad Station, Pennsylvania Railroad Warehouse, University of Pennsylvania, Campbell Soup Company, and more. Disbound from a large 1938 building material construction book, this unique old four page technical specification brochure would display wonderfully matted and framed. A marvelous addition to your retro architecture and engineering library.