Hi-Standard Model HB, .22 long rifle cal. single action auto pistol.  Serial #299967, mfg. New Haven, CT.  Good condition.  6 3/4" barrel has very good rifling with some frosting, fixed sights with hand painted front sight.  70% blue finish with the heaviest wear being on the barrel and straps.  One hit to the metal on the left side of the barrel close to the muzzle.  HS marked black checkered plastic grips are very good.  Comes with one very good unmarked factory blue magazine.  C&R OK.