Original oil and gas trade magazine vintage ad for AMERICAN ROLLER BEARING COMPANY of Pittsburgh, PA. The Big Parade! The Day of the Big Elephants! The heavy duty beasts of burden, the make in trade that stands for the heavy duty bearings of industry. American Roller Bearings are on parade everywhere there's drilling being done. This unique 1931 old petroleum oilfield equipment magazine advertisement would display beautifully matted and framed.