Smith and Wesson was notorious for shipping revolvers that were not even close to their manufacture date. You need a letter from Smith and Wesson to know that date and the manufacture date.
Without a letter the S&W Fourth Edition lists value as $600 in "Exc" condition which I think describes your revolver accurately. S&W made a buttload of these which explains the low value.
While it would be a "nice to know" piece of information, the completion date of any given item is generally unknown. (Note the use of the weasel word "generally". That's because some completion dates are known.
Two of my 3rd Model Single Shots were numbered such that I surmised they just might have been completed on the same day (4807 and 4826---a 6" and 8" respectively)------and then I mustered up enough courage to ask, hoping beyond hope I didn't get my head handed to me!
Here's what's what with those two----and the very gentlemanly upbraiding I got for asking.
4807 was------"part of the production run of 31 units completed on May 9, 1911 and entered into the shipping vault on that date." As an aside, that pistol wasn't shipped until November 11, 1915. (You reckon maybe that's where the phrase "Go figure!" originated?)
4826 was--------"completed on June 21, 1911"------and shipped on June 24, 1911. That snappy service was because it was a "special order for a single unit".
Then, just to make sure I understood all this, this little shot was added: "This certainly establishes that they were not produced in the same production lot of Perfected Single Shot Pistols."
I tell this little tale only to emphasize the fact a letter is NOT going to tell you the manufacture date of an item----just the shipping date.
I dare say our letter folks have access to virtually all of the shipping records. They very clearly also have access to SOME of the completion dates---but not nearly enough to be able to provide them to us on a regular basis.
Ralph Tremaine