Closeup of a small rusted threaded fitting on a gray surface

Closeup of a small rusted threaded fitting on a gray surface Spark plug with white ceramic insulator marked "Air Friction" Close-up of a Western Giant spark plug with text on the ceramic insulator Metal spark plug with four curved electrodes inside a cylindrical housing Spark plug with 'Troja' text and a horse logo Spark plug with GE logo, threaded pipe fitting, and a metal bracket Spark plug with 'CUPPLES SC "778"' markings Tin box with a diagram of a cutaway spark plug labeled TUNGSTEN Antique brass spark plug with glass window beside its worn illustrated cardboard box Advertisement for Champion spark plugs, a diagram of a spark plug and text in French and English Advertisement for Champion spark plugs, showing two different models and text about their adoption by car manu Advertisement for Champion X spark plug with box and text Champion spark plug with text 'Champion X Reg. U.S. Pat. Off.' Advertisement for Champion Dependable Spark Plugs, a large spark plug and illustrations of early automobiles a Advertisement for Mosler Superior spark plugs, mentioning Ford Motor Company and Blue Print T 138G Advertisement for Mosler Superior Plug, a close-up of a spark plug 16photos in this albumView all