1957 Auto-Lite Power Tip Spark Plugs General Motors Vehicles Thumbnails - Magazine Ad

this original 10.5 x 13.5" magazine ad from 1957 features the Auto-Lite Power Tip spark plug as used in General Motors vehicles.  thumbnails of the 1957 Oldsmobile, Chevrolet, Cadillac, Pontiac and Buick are also shown in the ad.