Manufactured circa 1867-1868, this is an example of a Type I, Transitional (aka Model 1 First Variant) over/under Remington derringer. Remington manufactured only about 100 of these derringers. The left side center rib is marked "ELLIOT'S PATENT DEC. 12, 1865" and the right side rib "E.REMINGTON & SONS, ILION, N.Y.". The matching serial number is marked on the frame under the grips and on the underside of the barrel. The left side is fitted with a manual extractor. All nickel finish, blade front and notch rear sights and fitted with smooth rosewood grips.