Very informative thread! Here's some pics of mine SN 217XX.

Mine did not come with the original diamond round butt grips, but has a pair of square butt grips that don't fit too well as you can clearly see. I'm wondering if any round butt J-frame grip will fit (the previous owner said he took some grips off his Model 10 and that they fit fine but he sold it to me with these lol)???