This is a Forehand & Wadsworth British Bull Dog D.A. revolver and is 38 S&W centerfire caliber. It retains 93% original nickel finish with excellent mechanical function and a beautiful bright and shiny bore with very strong rifling. The grips are sharp and crisp. Manufacture of these pistols ended in 1890 at serial number 114,000. This is serial number 103927 and is matching numbers.