Progress is fine, but it's gone on for too long.: Champion spark plug
Champion (spark plug) - Wikiwand
L86C Champion Spark Plug that replaces L10
Champion (spark plug) - Wikipedia
Champion (spark plug) - Wikipedia
The story of the Stranahans, Champion Spark Plug and the preservation of a world class park - History Mystery Man: Historical Storyteller, Small Town Traveler, Auto Racing Icons