Description
Full color 9 1/2″ x 13 1/2″ ad for the AC Fire-Ring Spark Plug. There is a large drawing of one of their plugs, igniter burning, and the headline claims “We make the only spark plug with four green ribs”. It then says that “That’s so you’ll know at a glance you’ve got self-cleaning ACs to help boost engine power. Ask for AC Fire-Ring Spark Plugs the next time you change”.
Source: September 8, 1964 Look magazine & September 18, 1964 Life magazine.
