Baldwin Premium Half Single Dummy Door Knob in Porcelain with Satin Nickel Finish Trim.   Item # is 5810.150.IDMRD.  Kelham Porcelain Knob.  Single Dummy.  Non-operational doors.  All of the pieces and parts are included but the original box interior packaging is missing.  Includes Allen wrench and extra Allen screw.  This is a beautiful knob and not sure where this was planned to be used.