You dont tell us which version, so we dont know if you have the K22 Target or Combat Masterpiece. In any event, $250-$450.
@ 112 years old
You can get it lettered by S&W.
Need to know the caliber in order to answer.
50 yrs old
100-500 USD or so
Made @ 1964.
Requires hands on appraisal
Anywhere from $300 to $550.
Impossible to answer without more information, such as caliber and type of action.
Your Description and serial number indicate that you have a Smith and Wesson model 30,or 31 which was made between 1961-1970.
Cannot be determined from just the serial number. Need a DETAILED description of ALL markings.
K