Manufactured circa 1859 to the early 1860s with a total production of about 200, these unique 12 shot revolvers were manufactured at the Union Knife Company in Naugatuck, Connecticut, for Walch and J.P. Lindsay. The Walch mechanism is one of the most unusual of the American percussion revolvers. There are double hammers and triggers, six cylinder chambers and 12 percussion nipples (outer and inner). It is single action with each chamber holding two charges. The front charge is fired by the outer nipple being struck by the right hammer, which is released by the right trigger (which is set slightly forward of the left trigger), continual pulling on the triggers engages the left trigger which strikes the inner nipple firing the inner charge. The revolver lacks the barrel address. The left side heel of the frame under the grip, front face of the cylinder, and loading lever are marked with the number "1". Cone front sight and no rear sight, Colt style two piece loading lever and rammer, and fitted with two piece checkered walnut grips.