Hi, Al. Here's some application info for your spark plugs....just for the fun of it. Good luck with your sale. John
Champion 62S Spark Plugs, 18mm 5/8"x 24 lead end. 1939-45 W.W.II, Aeronica L-3, Military Spotter Plane with, Continental engines. This plug has other applications, such as the amphibious W.W.II Duck. These are the (Shielded version), of the Champion C-26 & C-27.