Go to the S&W website and follow instructions for getting a letter.
1948. Worth spending the $30 to get it lettered by Smith and Wesson, IMHO.
You can get it lettered by S&W.
You will need to call S&W and get it lettered.
Will need to be lettered by S&W
Then only way to know for sure is to get it lettered.
You will need to get it lettered.
You will need to get it lettered by S&W.
You will need to get it lettered by S&W
You will need to get it lettered by S&W to find out. Cost is 50 USD
You will have to get it lettered by S&W to find out.
1857-1881, three issues, six variations w/in first issue, value range 100-7000 USD depending on what issue and/or variation, box, papers, condition. I strongly suggest you invest the 50 USD to get it lettered by S&W.
Take it to a gunsmith or be prepared to invest in tools and books that will allow/describe the procedure.