Up for Buy-It-Now is a new old replacement stock ignitor drive  gear, Niehoff part number 5077.  This item was obtained from an old service garage and is not a newly remanufactured part.  According to my Niehoff Manual, this is used on the following models and years:

1925-1931 Nash

  The gear has 12 teeth and has the following measurements...1 23/32" x 1/2 x 1/2":  It is in brand new, never used condition and is free of any damage.  Cast on the assembly is 5077.
  Please  feel free to E-mail me questions.  International bidders are always welcome.  Thanks for looking!!!