Electric Head Assy-Dbl, CB,Svce (ICBDF48,ICBDF60)
 ICBDF48  Use From Serial #17300000 to #17309466.
          Prior to Serial #17300000 See 817691.
          From #17309466 to #17312500 See 821815.
          Starting With #17312500 See 827174
 ICBDF60  Use From Serial #17300000 to #17309466.
          Prior to Serial #17300000 See 817691.
          From #17309466 to #17312500 See 821814.
          Starting With #17312500 See 827174