Original door trade vintage catalog for EQUIPMENT & SUPPLY COMPANY, INC. Main office was located at 51 Madison Avenue, New York City, NY. Manufacturers of adjustable steel Paneldor door, for room ventilation in hospitals, schools, apartments, state rooms, and public buildings. Eliminates transom. Sneakproof. This unique 1931 old one page technical architect brochure would display beautifully matted and framed. A marvelous addition to your retro engineering and design library.