Original old oil and gas industry trade magazine vintage ad for TRETOLITE COMPANY of St. Louis, MO. The College of Cut Oil. Years of research into the cause and cure of petroleum emulsions by the late Wm. S. Barnickel preceded the development of the Tret-O-litE Process. This 1931 petroleum oil field drilling equipment magazine advertisement would display beautifully matted and framed.
- SKU x452
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