100-10000 USD depending on EXACTLY what you have.
50-1000 usd
With the brief description that you have supplied,I would say that you have a SMith and Wesson model of 1905 4th change revolver.
What model?
50-275 or so
50-500 usd
Engraved and nickel plated Smith Wesson Model 29
50-500 usd
You would need to include the overall condition of your revolver,the amount of original finish remaining,bore condition and serial number(to date and identify the correct model of revolver).Only then could a value be placed on the firearm in question.
The value of a Smith and Wesson 1897 serial 539443 pearl handle nickel plated gun depends on its condition. This gun in excellent condition is valued between 1200.00 and 1400.00 as of 2014.
You need the services of a gunsmith.
With this Smith & Wesson model 66 nickel plated haven't had a box of shells shot through it excellent condition like new Walnut handles
brand new it would be worth 750$.