Original oil and gas trade magazine vintage ad for WESTCOTT & GREIS, INC. of Tulsa, OK. For the Modern Gasoline Plant A Complete Line of Measurement and Control Equipment for Air, Gas, Steam and Water. Crobsy Compound Pressure and Vacuum Gage, Metric Orifice Meter, Davis Casinghead Gas Regulator. This unique 1927 old petroleum products and gasoline refining industry equipment magazine advertisement would display magnificently matted and framed.