Collecting Antique Spark Plugs

Antique spark plugs tell tale of American industrialism and ingenuity

At left: Lanning’s Mayo quick detachable plug. The plug could be removed without use of tools. Right: Lanning’s Maco dual primer plug. Commonly used in early fire trucks, the plug’s two sets of priming cups allowed quick and easy priming. “When you have to prime 12 cylinders, that made a difference,” Lanning says.
At left: Lanning’s Mayo quick detachable plug. The plug could be removed without use of tools. Right: Lanning’s Maco dual primer plug. Commonly used in early fire trucks, the plug’s two sets of priming cups allowed quick and easy priming. “When you have to prime 12 cylinders, that made a difference,” Lanning says.