I just bought a brass frame, modern version. I believe they originated in the mid-late 1800's and those were steel frames. A company in Texas re-introduced them mid 1900's at least in brass frame and maybe steel too but not sure on that. Apparently they were reliable and accurate, if not a bit homely looking compared to a Hawken or longrifle. Mine is still enroute so have not had a chance to shoot it yet.