Impossible to answer without a detailed description of all features, condition, finish, box, papers, accessories, etc..
You will have to call S&W
58 years old
Without a serial number, you will have to call S&W
Late 1950's. 1961
You will have to call S&W and give them the serial number to find out.
Depending on exactly what it is, 50-1000 USD.
If you call S&W, they will tell you when it left the factory.
It is on the frame.
You must call S&W to find out.
Call S&W and they will tell you when it left the factory.
If you call S&W they will tell you.