Just a quick story about this gun and a date inquiry. In the early 70s my grandparents house burnt down and I remember helping look for anything to save. My dad found my papaws pistol and brought it home, I believe he took it to a gunsmith who sent the gun to S&W. This is the gun he received back as far as I know my dad never shot it and papaw told him to keep it. I have had the gun for over 20 years after my dad passed, it stays put away in the box wrapped with dad's monogram handkerchief wrap by S&W anti rust paper just the way dad kept it. I only take it out of the box a couple times a year to clean it with flitz and make sure no rust is appearing. Question is about production year from serial number, no model number is in the yolk just assembly number which is different from frame.