Wesson made a few different types
Smith and Wesson
100-1000 USD or more.
1961-1988
Browning, Colt, Ruger, Smith and Wesson, Walther, Hammerli
50-250 usd
100-1000 USD or more depending on specifics.
100-300 or so
1948
You will have to call S&W to find out.
Standard Catalog of Smith and Wesson, 3rd ed.
the model is stamped inside the cylinder housing
Use a snap cap to be on the safe side.