Up for Buy-It-Now is a new old stock replacement stock distributor cap, Niehoff part number AL-27.  This item was obtained from an old service garage and is not a newly remanufactured part.  According to my Niehoff & Auto-Lite and v Manuals, this is used on the following models and years:

1926-1928 Essex..Super 6

  The cap is in brand new, never used condition and shows no indication it was ever mounted or installed.  It is free of any chips or damage.  There are no markings cast on the cap.  The original Niehoff box is in good condition.
  Please feel free to E-mail me questions.  International bidders are always welcome.  Thanks for looking!!!