This used Smith & Wesson US Army model of 1917 revolver fires the .45acp round. It has a 5 1/2" barrel with an overall blued finish. This revolver was manufactured 1. It is stamped "UNITED STATES PROPERTY" on the underside of the barrel. The left side of the barrel has the following markings:45" .900 7TONS
It also has a couple of proof marks on the right hand side of the barrel. This 6 shot revolver is in surprisingly good condition for how old it is. The grips are not original.