HI There,
Hoo boy, You are asking a hard question.
First off, S&W did not record manufacturing dates of
their firearms. All that was recorded was the sales/
shipping dates. This can be confusing because a revolver
may languish 'in stock' for many years before it is sold.
Of course, if it was in high demand at the time, it would
likely have been shipped soon after manufacture.
The only way to get sale/shipping info is to write the
S&W Historical Foundation and ask for a Letter. The
cost is $100 (it is cheaper if you join the S&W Collectors
Association and Historical Foundation).
Value can be difficult to determine from a photograph
(depending on the photos). I cannot tell (for sure) if your
revolver has been re-finished. IF the finish is the original
Factory finish, I would guesstimate $275 to $400.
Cheers!
Webb