The distinctive "hammerless" (concealed hammer) C.S. Pettengill Army Model revolvers were manufactured by Rogers, Spencer & Co. in the early 1860s and were essentially upsized versions of the late 1850s Pettengill Navy Model. The top strap has the Pettengill and Raymond & Robitaille patent markings, and several small ordinance inspection marks are on the various components. It has a post front sight, frame groove rear sight, and walnut grips with cartouches. The U.S. Ordnance Department originally contracted for 5,000 of these revolvers but decreased the order to 2,000 after trials. The revolvers were then altered per the government's requests and delivered in the fall of 1862 and in early 1863. They were issued to multiple cavalry units during the war including the 3rd Michigan and 3rd Illinois Cavalry.

Very good as period replated. The revolver retains 85% of the nickel plated finish with some flaking and minor pitting. The grips are fine with some repairs on the right panel and general mild wear. The action functions, but is loose and does not lock up, and most of the marking aside from the cartouches are legible.