Colt 3rd Model, .41 Rimfire cal. derringer.  Serial #NSN.  Good condition.  2 1/2" barrel has good rifling, but has scattered pitting, fixed blade front sight.  70% blue finish on the barrel with pitting on the left side.  Nickel frame is excellent with some light fading.  Barrel pivots to the side for loading and unloading.  Clear coated smooth wood grips are in very nice shape with some wear and light hits.  Antique so it can ship directly to you where permitted.