.22 caliber single shot pocket pistol, rose but grip, 3,5&quot; barrel, rosewood or walnut grips, square but, somes engraved, approximately 2,100 made, marked T.J. STAFFORD NEW HAVEN, CT. on the top of the barrel and up to approximately 300 &quot;Patent Applied For&quot; on the buttom of the but or &quot;Patented/march 19.1860&quot; for the later production,