One of less than 250 manufactured between 1955 and 1958. The Kimball was a failed attempt at producing a blow-back operated 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 shipping box, factory box identifying the pistol as "MODEL Nov. 1955", extra magazine, and manual.

Excellent overall, retaining 98% plus original blue finish with attractive plum color, limited edge wear, and minor handling marks. Grips are also excellent with crisp checkering. The slide release is stiff, otherwise mechanically fine. Box is very fine with peeling on the lid.