Hi-Standard Sport King Lightweight, .22 long rifle cal. automatic pistol.  Serial #731547, mfg. Hamden, CT.  Good condition.  7” barrel has excellent bore, fixed sights.   Barrel and slide have 75% nickel finish with some flaking and light corrosion.  Matte-finished frame has 80% finish with rub marks on back strap.  Black plastic contoured grips are excellent.  Correct H-S magazine.  Action works fine.  Unusual to see in nickel - highly desirable. C&R OK.