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Blue Book of Gun Values
Colt Model 1877 "Lightning" Double Action Revolver in caliber .38 Colt and the similar revolver model "Thunderer" in caliber .41 Colt.
10-1000 USD depending on specifics.
Best course of action is to take it to a gunsmith.
1962
25-75 USD
and the question is: .........................????????
It depends on the make and model. Is it a double action or single action revolver?
25-60 or so
I assume your single action is pre-war ? If so, then made about 1907. As to the caliber, check markings on barrel. that should give the caliber.......
1958
Impossible to answer without more information, such as caliber and type of action.