Hello to all. I have received an old Smith and Wesson 38 special pistol which was passed to me from my grandfather. I have no documentation on the gun and would like to know how old it is and any details the serial number might tell. The serial number is a five digit number on the bottom of the gun between the two sided hand grip. The number is " 50978 ". Rumor within the family is that my great grandfather carried this gun as a police officer many years ago. Any hep would be greatly appreciated.