Original oil and gas trade magazine vintage ad for NORTHWEST ENGINEERING COMPANY. Main office was located at 1513 Field Building, 135 South La Salle Street, Chicago, IL. Workhorse of the Pipe-Liners, Model 25. Machinery bases are rugged, heat treated alloy steel castings. Side frames are cast integral with the rotating base casting. It assures a lifetime permanence of shaft alignment. Eliminates weaving that is the direct cause of wear. This unique 1959 old oilfield petroleum pipeline industry crane equipment magazine advertisement would display beautifully matted and framed. Nice graphics.