Volcanic pistol - This is truly a unique and rare gun. The patent date on this was February 14, 1854. The designers of this gun are worth looking into. Smith and Wesson teamed up with Winchester to create this gun. It just so happens that a young man named Tyler Henry was a lead designer at Winchester. So, together 4 names that we all know, worked to design this gun. It was a lever action pistol and a cartridge pistol. Click on this link for more information. Www.nramuseum.org Appears to be operable.