Burnerd Old Type Scroll Plate

  Burnerd 8" & 9" Old Type (Pre Pratt Burnerd) Chucks.
 
 - Metric Dims =
  111.10mm  Bore,  188.8mm Out Diameter 18.35mm thick and 76 teeth.
  Scroll Pitch 8.46mm.
  Teeth pitch 7.5mm at outer Dia.
  - Imp Dims =
  4. 3/8"  Bore  7. 7/16" O/D  23/32"  thick and 76 teeth.
 
   Any more or confirmation of dimensions please ask, thanks.