AC Fire Ring 44XLS spark plug 5612406 GM green ring vintage NOS

NOS AC 44XLS Spark Plug. Acquired from a closed dealership. See pic.

NOS AC Fire Ring Spark Plug (1) #44XLS, Circa 1970

44XLS AC Automotive Spark Plug Made In USA 44XLS Automotive Spark Plug

NOS AC Fire Ring Spark Plug. 44XLS. SP400.

Zundapp Suzuki Outboard NGK Spark Plug p/n B-77HC or W3AC NOS #6 14 mm x 12.7 mm

AC R44N Spark Plug NOS