Original classroom trade vintage catalog for E. W. A. ROWLES COMPANY. Main office and factory was located at 2500 Prairie Avenue, Chicago, IL. Manufacturers of Blackboard, Metal Trim, Display Rails, Bulletin Boards, Map Rail, and Miscellaneous School Equipment. Permaroc, Perma Korkbord, Seloc Glass, Duroplate, Enduraroc, Trims with Offset or Flush Mouldings. Disbound from a large 1938 construction equipment book, this unique two page technical specification brochure would display wonderfully matted and framed. A marvelous addition to your retro architecture design and engineering library.