Original electrical trade vintage catalog for WOLFE & MANN MANUFACTURING COMPANY, was located at 28th and Sisson Streets, Baltimore, MD. Manufacturers and designers of switchboard, panel, switchgear. Meeting Navy standards. Shown is main switchboard of the Charleston Plant West Virginia Pump and Paper Company, and substation switchboard at Parker Dam Power Project in Phoenix. Disbound from a large 1944 electrical construction materials book, this unique old two page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library. Pages are detached and contains a small amount of residual glue on edge.