Not much help
I have a book but it only goes up to about the late 70's as a historical book.
This may sound like a copout, but if no one else has the info on here, you can go to the S&W website and get their customer service number. They will tell you what year it was made with no prob. If it was an antique collectable, they can sell you a factory letter that gives alot more specific info. Lots cheaper than Colt does.