You have one of the finest DA/SA Pistols ever made in this country and spawned a whole series of firearms for S&W. Everything was just right when I acquired mine from the S&W rep’s trunk in the Sixties, the grip seemed to fit my hand naturally giving the ability to quickly point the pistol and hit what it was pointed at. Those were the days when the S&W revolver reigned supreme in police departments and special permission for me to carry the 39 as a test was needed from the Chief.
After a period of time I went back to my Mod. 19 but continued to carry the 39 off duty. When 59’s came out I was able to include it as an alternate weapon and purchased departme training ammo along with .38.