Original insulation trade vintage catalog for A. J. SPANJERS COMPANY. Main office and factory was located in Minneapolis, MN. Manufacturers of Double Seal Metal Weatherstrip and Bed-Dor-Seals. Spanjers double seal interlocking weatherstrips. Unbound from a large 1938 architectural catalog, this unique old one page technical brochure would display wonderful matted and framed. Nice graphics. A terrific addition to your retro window and door weatherstrip library.