Original oil and gas trade magazine vintage ad for NATIONAL TRANSIT PUMP & MACHINE COMPANY of Oil City, PA. Years and Years Ago When Steam was in Its Glory the Prairie Pipe Line Company was a large buyer of Transit Triple Pumping Engines for their Mainline Pumping Stations. Later they were the first to fit new Transit Power ends to the old reliable fluid ends of these pumps, and they are running today as well as ever. The Transit Pipe Line and Refinery Pumps you buy Today will Give You The Same Service. Unique 1930 old petroleum industry pumping equipment magazine advertisement.