Original door trade vintage catalog for NORTON LASIER COMPANY of Chicago, IL. Manufacturers of Concealed Door Closers, in 86 Types and Sizes. Overhead, single acting, double, floor concealed, brackets, installation details provided. Disbound from a large 1941 construction materials book, this unique old sixteen page technical specifications brochure would make a sensational addition to your retro architectural library. Pages are loose and contain a small amount of residual glue on edge.