An unusual barrel length. You need to verify with S&W that it is factory. If so, value could be in the 1000 USD range.
No way to answer without detailed information on all markings and features.
Factory option.
No
100-1000 USD
50-500 usd
the value of a smith Wesson 8 inch barrel model 27-2
With the brief description that you have supplied,I would say that you have a SMith and Wesson model of 1905 4th change revolver.
1979
100-500 USD
100-1000 depending on specifics
Blue and Nickel
50-1000 usd