taxmiser,
By all means feel free to send me an e-mail with as many attached pics as you think may be helpful. I'd appreciate, as I noted before, inclusion of a scale or ruler (so that I can compare your revolver with my Outdoorsman, which was produced a couple years before your revolver was).
Don't get your hopes too high, this may be gun made from mixed parts, or there may be some other explanation for a seemingly unique piece. Still, it is a most unusual revolver, and I'd like to emphasize that I think it's worth your while to seriously investigate the history of this particular gun.
If you wish, let me know if you want the pics posted on this forum, so that anyone more expert than I am can venture an opinion. (While I do collect S&W D.A. revolvers made between the 1898 & 1955, I readily admit that I know far more about old Colts than I know about old S&W's).
Bob