Original oil and gas trade magazine vintage ad for SKF INDUSTRIES, INC. of Philadelphia, PA. Increases Spherical Roller Bearings capacity 25 to 50 percent by means of improved internal design. This improvement in series 222 and 223 increases the service life 2 to 3 and a half times. Assures uniform load distribution over the entire length of the longer rollers at all times. This unique 1953 old two-page gatefold petroleum industry equipment magazine advertisement would display beautifully matted and framed.