Smith & Wesson has made dozens of different revolvers chambered for the S&W.38 Special cartridge. In addition, there are hundreds of different revolvers that were not made by Smith & Weson but are marked with the exact wording from your question because they use the same ammunition. So your firearm could be:
a) A cheap Saturday night special worth more as a boat anchor than as a gun.
b) A custom-made one-of-a-kind worth several thousand dollars.
or
c) Somewhere between these extremes.
@1973
100-400 USD
100-300 USD
50-400
100-1000 USD depending on specifics.
40-400 usd
10-300 usd
50-300 usd
50 and up depending on EXACTLY what you have.
20-40 USD or so
up to 100 each
whats it worth