I acquired a Taurus 5-shot DA revolver that is very close to a S&W Model Chief Special. I think it's chrome, though it may be SS (very highly polished). The only thing is it doesn't have a hammer spur. It as a frame mounted firing pin, and the hammer when in the down position follows the contour of the frame and is also highly polished. It says 2789 on one line and 85 below it in the frame opening where it meets the crane. I'd guess it's a model 85, but I haven't seen one without a hammer spur. Any ideas?