Ruger Blackhawk, .357 magnum/9mm cals. single action revolver.  Serial #31-23846.   Very good condition.  Flat top, three screw, pre-transfer bar and pre-warning label.  6 1/2" barrel has an excellent bore, fixed front and adjustable rear sights.  85% blue finish with some muzzle finish and scattered general wear.  The 9mm cylinder is in the box and excellent.  The action locks up solid.  Ruger black eagle logo inset into smooth wood grips that are in good shape with some hits and impressions and a small crack at the top of the left grip.  A solid early model Blackhawk!