Your revolver (s/n BAN3781) was manufactured in 1988 according to the "SCSW 4th Ed." The 686-2 was introduced in 1987, and was manufactured a few years before the Internal Lock ("Hillary Hole") was released. In general, pre-lock guns are more desirable than those with the IL. Right now, the 3" bbl. versions appear to be more popular than 4" or longer, but yours is in very nice condition and I would expect it to valued at $900+. Do you have the original plastic case and goodies? I recently purchased a minty 3" 686-6 Plus (7-shot) for $750 and was happy to get it. The L-frame revolvers are outstanding revolvers, built like tanks, and are fun to shoot. Enjoy!