Original oil and gas trade magazine vintage ad for BAKER OIL TOOLS INC. Main office was located in Los Angeles, CA. Controlled Scratching more mud cake removal, protects against destructive pressure surges while running casing. Supplements the pressure-reducing performance of Baker fill-up equipment and superior centering action of casing centralizers to provide more than a good cement job. This unique 1959 old oilfield petroleum drilling industry magazine advertisement would display beautifully matted and framed.