Mike - You've got a .32 Safety Hammerless 3rd Model, manufactured from 1909 (SN 170000) to 1937 (SN 242981). You can interpolate to get close to the actual year, but there's no more definitive info in SCSW. You might be able to get a year by calling S&W, but otherwise it'll cost $50 for the factory letter.
With regard to value, the gun appears to be in amazingly good shape, although it's always difficult to tell from a photo. If it's not a reblue, it's probably worth several hundred dollars or more.