Original oil and gas trade magazine vintage ad for CHAIN BELT COMPANY. Main offices were located at 4619 W. Greenfield Ave. Milwaukee, WI. REX Positioned Bushings for extra strength. For the high speeds of modern drilling service, bushings in an oil field roller chain are highly critical parts if long life is to be assured. Special design and manufacturing techniques have been developed to provide maximum fatigue strength. This unique 1959 old oilfield petroleum drilling industry magazine advertisement would display beautifully matted and framed.