Ames manufactured approximately 4,250 of these distinctive "mule ear" breech loading carbines between 1843-1846, according to "Flayderman's Guide" (9th Edition, 9B-061). The Jenks carbines were originally smoothbores with a round loading aperture. Around 1861, most Jenks carbines were rifled and had the loading aperture enlarged to an oval shape to accept a paper cartridge rather than loose balls and powder. "Wm JENKS" and "U.S.N./RC/P/1845" marked on the top of the barrel at the breech ahead of the oval loading aperture, with a rifled bore. "3/41" marked on the underside of the lever. Small "P" inspection marks are on several components. The lock plate has the Ames three-line marking in the center and "Wm JENKS" towards the rear. Sling ring mounted on the lower tang. Oval script "RC" (Rufus Chandler) and bordered script "JL" (Joseph Lanman) inspection cartouches stamped on the left of the stock.

Very fine, retains 90% plus original browned finish on the barrel with a few minor scratches, and 80% plus original case colors, with sharp markings and edges in the metal overall. The brass exhibits an attractive original bright golden patina. Stock is very fine as re-oiled with defined edges, a few minor scratches and dents, and crisp cartouches. Mechanically excellent. This exceptional N.P. Ames Jenks Navy carbine would make a fine addition to any U.S. martial firearms collection!