Manufactured circa 1859 to the early 1860s with a total production of about 200, these unique 12 round 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 top barrel flat is marked "WALCH FIRE ARMS CO. NEW YORK / PAT'D FEB. 8, 1859". The left side heel of the frame under the grip, front face of the cylinder, wedge and loading lever are marked with the matching serial number and the butt and right barrel flat are marked with assembly number "92". Cone front sight and no rear sight, colt style two piece loading lever and rammer, and fitted with two piece checkered walnut grips.

Refurbished overall. All metal has been professionally cleaned and is in the white (possibly in preparation for restoration). The markings were re-engraved at this time and are now very legible. There are a few minor scratches on the barrel, a couple of areas of light discoloration on the left side of the frame. The loading lever is cracked where the screw anchors it at the lug. The grips are good plus overall. There is a small chip on the right toe, a couple of minor bruises on the right panel, both panels are slightly warped at the bottoms and the checkering is crisp. The markings are crisp and clear. The action is excellent.