Original wall trade vintage catalog for H. H. W. BERGMANN COMPANY. Was located at 126-132 Nassau Street, New York City, NY. Manufacturers of adjustable wall louvers for all types of buildings. BECO controlled ventilation with storm proof protection. Easily and quickly installed. Vertical section is also shown for extruded aluminum louver. Numerous images, illustrations, product details and architect specifications provided. Unbound from a large 1958 architectural catalog, this unique old four page technical brochure would display wonderful matted and framed. Nice cover graphics. A terrific addition to your retro wall construction library. Pages are detached and may contain a small amount of residual glue on edge.