Becoming more scarce…Colt’s No1 single shot derringer in .41 rimfire. Simple side pivoting design for easy loading. Marked on top “COLT’S PT. F.A. MFG.Co/HARTFORD CT. U.S.A./No 1” *Antique, No FFL needed Condition: Antique Fair, Finish is 0%. Barrel and frame have matching serial. Barrel pivots freely and smooth, has some looseness in locked position. Bore is pitted. Cocks and fires well.