Original oil and gas oilfield industry trade magazine vintage ad for AC SPARK PLUGS of Flint, MI. Division of General Motors Corporation. AC Brings You The Hottest News In Spark Plugs. Exclusive Buttress Top insulator design, Copper Glass seal. Old 1955 petroleum equipment magazine advertisement.
Original old car parts magazine vintage ad for AC SPARK PLUG COMPANY of Flint, MI. Dirty or Worn Plugs Waste One Gallon of Gasoline in 10. Have Your Plugs Cleaned by the New AC Method. Thi..