That is a Beautiful gun!
First, before ANYTHING, I'd like to personally and publicly thank Forum Member linde for his help. Before this revolver even came into my possession, I contacted him through this board with some questions. I am a relative new guy, with even fewer posts, but he took the time to not only get back to me with answers to my questions, but within about 16hrs to boot! Thank you Sir.
Now onto the gun.
It's a 1957 ISP Pre-14 delivered in a batch later that year to the Illinois State Police. A few honest wear marks. Locks up solid. I only own one other S&W (a late 70s M28) but after seeing the finish on this gun, I understand what it's all about. Except for maybe a SKB O/U skeet gun, I've never owned anything with such deep blueing. It's truly remarkable, and I'm sure that even at that, there are tons of examples of finish even better.
I plan on getting it lettered, and of course signing up for the SWCA. I think I've found a new retirement hobby. I appreciate the wealth of information here and the cordial attitudes.
Cheers