Is the model number still viewable under the crane? Is it an early 'no dash' model, or is it a 686-(x number)? Can you see an "M" stamped under the crane? There was an issue with early models that is still being repaired for free by S&W if the M is absent. S&W has a lifetime warranty, maybe you might be able to ship it back to S&W to have them re-stamp the numbers since the SN is is on the frame?

