http://www.rockislandauction.com/viewitem/aid/67/lid/1392

Devisme of Paris was one of the early manufacturers of a true centerfire cartridge revolver, with production of this model beginning in 1858 or 1859. This is a bottom-break 11mm, 6-shot revolver, made to a very high standard of quality. Devisme also made a variety of other guns, including indoor parlor pistols, percussion guns, and dueling-style pistols.