Need help with an ID on my father-in -law's 38 S&W SPECIAL CTG. On the bottom of the barrel is S 998954. On the cylinder is 87994. The left side wooden grip has 995 and 445 on the inside.The gun was pasted on from his father to him quite a while ago. in the early 70's he flared the 6" barrel with some reloads. he then put it in a bag until last fall. Then for x-mas i took it to a gunsmith and had it checked and reblued,the barrel shortened to 4" and a front site put on. I was interested in it's history. THANKS