Original oil and gas trade magazine vintage ad for OIL WELL SUPPLY COMPANY of Pittsburgh, PA. The Old and the New in Japan. The Oilwell Hild Differential Drive. The New Method of Drilling in Japan. The Chanselor-Canfield Midway Oil Company Completed 10 Deep Wells with an Oilwell Hild Differential Drive in the California Field in a period of 30 months. This unique 1928 old oilfield petroleum well industry drilling equipment magazine advertisement would display fantastic when matted and framed. Two page gatefold advertisement.