I have a colt 44 center fire Richards-Mason conversion pistol. It was my Great Grandfathers and I am looking for information and pictures of it. Pat. dates show 1871-1872 on barrell. I have not seen but a couple of pictures of its kind on the internet. It has a 8 in barrell and the rear sight is on the hammer. One piece rear stock and it looks like a silver strap around the stock.If anyone has info on this please let me know.