Original oil and gas trade magazine vintage ad for SECURITY ENGINEERING. Division of Dresser Industries. Security Gives You Quality-Tested Bits. Deeper and faster drilling plus new and more effective drilling methods have created rugged demands on rock bit construction. Security rock bits are designed and manufactured to meet present-day drilling requirements. Plants were located in Dallas, Texas, Whittier, California, Caracas, Venezuela, London, England, and Manchester England. This unique 1959 old petroleum oilfield drilling equipment magazine advertisement would look fantastic matted and framed.