312. Allen & Wheelock – Mod. 22 Side Hammer Revolver (3rd Model) – 22 Cal. RF Single Action Revolver – w/2 ½” Octagon Barrel w/Bead Front & Groove Rear Sights – Gray Finish – w/Factory Wood Grips – w/Cylinder Scene – Approx. 1,500 Mfg. Between 1858-1865