Date update: My brother told me it was from 1954 (and the incomplete SN would be, but with the date code adjusted SN, it's from 1972. 18 years younger than I thought. Real paper book beat out the internet again. That makes is 53 instead of 71. Not a deal beaker in any way.
The oldest S&W I own is and 1896 Lemon Squeezer (38 S&W), the oldest functional gun I own is a 1886 Spanish Reformado rolling block in 43 Reformado. The oldest gun in partial form I have is an 1855 Colt Root Revolver. These are all modern compared to my best friend that has owned "French & Indian War" guns and worked on much older Brown Bess Muskets. Things made from "Blue Steel and Black Walnut" will be here long after the polymer guns return to the earth, as I will too. We don't really own any truly durable thing. We are just the caretakers! I am at least the third caretaker plus at least two dealers for this gun, my nephew had no interest in it. I raised my kids to prize older technology. If I still have this when I return to the dust, I'm sure they will all desire for it to reside with them! Since I have a S&W M&P9c for carry, I doubt I'll carry this much (just like I seldom carry the Colt Commanders I own).
Ivan