| 1901 | 9 cylinder RADIAL ENGINE ignition for -NGK- ME-8 1/4 -32 90degree |  ME-8 1/4 -32 90degree | 
      
          | 1902 | 9 cylinder RADIAL ENGINE ignition for -NGK- ME-8 1/4 -32 120degree |  ME-8 1/4 -32 120degree | 
      
          | 1903 | 9 cylinder RADIAL ENGINE ignition for -NGK -CM-6–10MM 90degree |  -CM-6–10MM 90degree | 
      
          | 1904 | 9 cylinder RADIAL ENGINE ignition for -NGK -CM-6–10MM 120degree |  -CM-6–10MM 120degree |