Original oil and gas trade magazine vintage ad for PLYMOUTH OIL COMPANY. The yardstick of American Progress. Walter S. Hallanan, President. Ever since the day when the discovery of oil took America out of the candlelight of economic lethargy and into the kerosene and gasoline ears of dynamic expansion, the advancement of living standards has been in direct ratio to the increase in oil production. This unique 1951 one-page old petroleum products refining magazine advertisement would display beautifully matted and framed. Minor crease upper left corner.