Humble Oil And Refining Co. Enco 1964 Ad $9.00 Enco Gasoline 1964 Ad $9.00 Enco Gasoline 1964 Ad $9.00 Enco Gasoline 1964 Ad $9.00 Humble Oil And Refining Co. Enco 1964 Ad $9.00 Humble Oil And Refining Co. Enco 1964 Ad $9.00 Humble Oil And Refining Co. Esso 1964 Ad $9.00 Humble Oil And Refining Co. Esso 1964 Ad $9.00 Shell Oil Research Open Sesame 1965 Ad $9.00 Shell Finer Fuels For The Age Of Flight 1965 Ad $9.00 Shell Alkaline Shell X 100 Motor Oil 1965 Ad $11.00 Shell Gasoline 821 Research Scientists 1965 Ad $9.00 Shell Oil Is Ammunition 1965 Ad $9.00 Shell Oil Company 1965 Ad $9.00 Enco Oil Tiger In The Tank 1965 Ad $9.00 Humble Oil Maker Of Enco Products 1965 Ad $9.00 Humble Oil Esso Gasoline 1965 Ad. $9.00 Humble Oil Esso Gasoline 1965 Ad $9.00 Humble Oil Enco Products 1965 Ad $9.00 Humble Oil Enco Products 1965 Ad $9.00