Manufactured by an unknown party, the Sure Defender shows a number of design similarities to the Dolne "Apache Pistol" with a hinged grip arrangement with a set of finger holes; when opened, it is a single shot percussion pistol, and when folded, it becomes a set of brass knuckles with a swing-out dagger blade which, depending on configuration, serves as either a pistol bayonet or a trench-style knife. The only markings on the pistol are "THE SURE/DEFENDER" on top of the cast brass frame and "219" on the grip, hinge and trigger It has a blue finished barrel and other components. The dagger measures 2 5/8 inches long with a triangular cross section and a flamberge-style waved edge profile. The overall length is 6 1/4 inches when in "trench knife" configuration, and it has a weight of 11.2 ounces (0.70 lbs). The underhammer action operates with a steel spring mounted to the underside of the muzzle, a knurled striker and a spring loaded folding trigger. No information on this pistol was supplied by the consignor, but the aesthetic and mechanical similarities to the "True Companion" and another unmarked underhammer knuckleduster in this auction suggest that they were manufactured by the same party. The unmarked pistol is likely an early "developmental" or "prototype" model and the Companion and Defender evolutions of the design. Additionally, the absence of proof house or import marks on the Companion and Defender suggest American manufacture.