Model B 120 I 12000 RPM Pneumatic Grinder Rotary Tool 12947

  For sale is a Model B-120-I Air-Operated Grinder / Rotary Tool, Serial
  No.G80143.  12,000 RPM Spindle speed.  There is No manufacturer's
  name on the body of this unit.  Steel body and collet nose.  Aluminum
  air receiver section.  1/4" diameter collet for mounting tools.
  13-1/4" Overall length.  I have performed a basic air test on this
  tool, and it appears to be operating correctly.

(Click on the thumbnail images to enlarge)