To determine if a well worn Pre 27 ever went back to the mother ship for T L C what stampings should I expect to find under the grips etc? Will a factory letter reveal any and all changes/ updates that were made? I can already feel that dreaded virus for model 27s began to effect me, I hope it does not get any worse, those babies are expensive! I know you S&W hounds want pictures (lots of pictures) but at this time I only hope this post goes through to the correct outfit. I should say this is a recent find at an estate auction so I have no history of its life up till now though I promise a great retirement to the pasture with occasional romps at the range. Already bought the S&W book 3rd edition that lets me know its SN range S 77xxx puts its birth some time in the 1950s. You guys are the best!!! Regards,Graham