With the brief description that you have supplied,I would say that you have a SMith and Wesson model of 1905 4th change revolver.
Impossible to answer without a detailed description.
You will have to provide the serial number and a detailed description of the weapon.
Impossible to answer without a detailed description.
Provide a detailed description of ALL markings.
Impossible to answer without a detailed description of all markings, features and caliber.
Impossible to answer witout a detailed description of all markings and features.
Your Description and serial number indicate that you have a Smith and Wesson model 30,or 31 which was made between 1961-1970.
Impossible to answer without a detailed description of all markings and features.
Need a detailed description of ALL markings and features
Impossible to answer without a detailed description.
Impossible to answer without a detailed description of all features