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 Plug..
Original vintage magazine ad, AC SPARK PLUGS. Division of GENERAL MOTORS CORPORATION, of Flint, MI. A Line on Economy. Clean Spark Plugs Give you a Smoother, Snappier Engine. ..