Original oil and gas trade magazine vintage ad for INTERNATIONAL HARVESTER COMPANY. Main office was located at 180 North Michigan Avenue, Chicago, IL. UDT-817 pump drilling engine, designed for versatile application in a wide variety of rugged oil field uses. Answers the demand for dependable high power and lower cost operation on compressors, pumps, and on drill rigs. This unique 1959 old petroleum industry construction equipment trade advertisement would display beautifully matted and framed. Two page gatefold advertisement.