Unmarked percussion .36 cal. over/under derringer.  Serial #NSN.  Black Powder. Good condition.  3 1/2" barrels have excellent smooth bores, no sights.  Metal shows age with no finish to speak of on the barrel, some blue finish is on the frame.  White plastic grips are cracked, but complete on the left side and there's some old tape on the right side.  Comes with leather holster that appears to be homemade.  Black powder so it can ship directly to you.