Description
Three color 9 1/2″ x 13 1/2″ ad introducing their Fire Ring Spark Plugs. There is a picture of testing going on to make sure that the exclusive conducting seal on these plugs is doing its job. Two AC Spark Plugs are screwed into a fitting attached to a pressure gauge and the headline gives us the answer we were waiting for: “No Bubble! No Trouble!” The text gives the details of this test and how well they performed, making the users of AC Spark Plugs feel confident to use them.
Source: April 11, 1960 Life magazine.
