Early production. Grips are not original although they look like they might be Ropers. Should have come with "coke grips", they run $400 to $500 dollars themselves.
S&W did not start marking them as model 29's until about SN S184000 so that one should be a model NT-430 (Pre 29, not model marked). So, the model 29 labeled paperwork would not be correct for it either. If the box is original it will have the same serial number hand written on the underside of the box in white marker. The red felt is not original either, it should be blue. It would have come with a SAT (sight adjustment tool). That would be a $100 to $150 item also.
About $300 to $400. Removing the corrosion can cause more damage.
The SN dates it to 1997 so if it's a 442-1 it is +P rated.