New Old Stock BG-LS465A Aircraft Spark Plug with Massive Electrodes. According to
http://www.enginehistory.org/ these will fit
Wright Cyclone 7 735C7BA1, Cyclone 9 704C9GC1, and Cyclone 14 776C14BB1 engines, possibly others. The thread areas are covered in an oily possibly cosmoline material. There are some for sale on EBAY at $22 by someone else. I have 200 of them in the original packaging. I am asking $15 each, I will discount for quantity 10 or more purchases. Pictures available upon request.
Jeff Kinder
KindersKeep@sbcglobal.net