This is a very nice condition 31 caliber 5 shot Second Variation J.M. Cooper D.A. revolver. The serial number is serial number is 595 and is all matching. It retains over 80% blue and 85% grip varnish. The bore is very good bright and shiny and the mechanical function is very good crisp and tight. I would say this one was made about 1862 so it could have been used as a back up for a soldier.