It looks just like a 686-3 Classic Hunter that I own, except yours appears to have been modified. Flute-less cyl, same, but mine is still SS. Plus on mine the front sight is the std S&W insert ramp style, and there is no "art work" <G>. BTW, my S/N is BDRXXXX. The Classic Hunter with unfluted cylinders were made in the 686 & 629 series, there may have been others but these I have seen & owned. Hope this helps, k