Original oil and gas trade magazine vintage ad for EGGELHOF ENGINEERS, INC. Offices were located in Houston, Corpus Christi, Dallas, Lubbuck, and San Antonio, Texas. Also in New Orleans and Shreveport, Louisiana, as well as in Tulsa, Oklahoma. Specialists in Industrial Controls & Equipment. This unique 1951 old petroleum refining and industrial control equipment magazine advertisement would display beautifully matted and framed. Approx size 6 x 8 inches.