Pratt 9"

  Set of Hard Jaws for 230mm / 9"  Pratt Type 58 Scroll Chuck
  That's very old Pre Pratt & Burnerd, Pratt Chuck 
 
  Please double check dimensions in pic #2 to confirm.
  Original set with matching serial numbers.
 
  Used but great shape for an old set. 
  Obsolete, and very difficult to find.