Anyone know anything about a company by the name of Blue Crown? My next-door neighbor lady is old and she knows that I'm interested in gas related items. She stopped by this evening and gave me this spark plug. It has the original cardboard, but it is in rough shape. The spark plug is in unused condition and even has the little carboard sleeve around the threads to protect it. Does anyone know the history of Blue Crown and what else they may have made?
http://img121.exs.cx/img121/1477/bluecrownsparkplug7wf.jpg


Thanks in advance.

Mac