Original door trade vintage catalog for NORTON LASIER COMPANY, was located at 466 West Superior Street, Chicago, IL. Manufacturers of LCN Overhead Concealed, Floor Type Concealed and Standard Surface Type Door Closers. Disbound from a large 1938 construction materials book, this unique old four page technical specifications sheets would display wonderfully matted and framed. A marvelous addition to your retro architectural design and engineering library.