One of less than 250 manufactured between 1955 and 1958. The Kimball was a failed attempt at producing a blow-back operation pistol chambered for the .30 Carbine cartridge. It uses a series of rings machined into the chamber wall, which in theory would allow the casings to swell into the recesses and lock, delaying extraction long enough for pressure to drop. Of the reported 238 manufactured, many were destroyed during use by the severe recoil, making examples in this kind of condition even more rare. Features a ramped blade front and adjustable notch rear sights, with the Detroit, Michigan, address on the left side of the chamber, serial number on the right. The frame features a magazine release button on the left side behind the grip and a ribbed safety tab on the right above the trigger. Fitted with a pair of checkered plastic grips. Includes custom wood display case.