Manufactured by C.B. Allen of Springfield, Massachusetts in the late 1830s with a total production of less than 150. The revolver features a 7 round horizontally mounted turret held in place by an axis and the top strap. There is a lever mounted in the top strap, which when pressed releases the turret for manual rotation. The rear sight also serves as a latch for the top strap, securing the top strap when in the sighting position. The top strap is marked "COCHRANS / PATENT" and "C.B. ALLEN / SPRINGFIELD / MASS.", the "FIELD" and "MASS" are double stamped. The serial number is stamped on the right side of the frame ahead of the turret. German silver frame and the remaining parts are iron which were finished blue. These were usually made with iron frames. Brass and German silver framed revolvers are much rarer. The barrel is fitted with a post front sight and the revolver is mounted with a smooth one piece bag shaped walnut grip with a silver initial oval on the back. Although by no means a practical revolver, (due in part to the possibility of the shooter being shot himself), this experiment in the turret revolver is recognized by collectors as one of the distinct oddities in American arms development.