Depends on type of action. Need all of the markings, including the markings on top of the barrel.
Need to know the caliber in order to answer.
You can get it lettered by S&W.
@ 112 years old
Made @ 1964.
100-500 USD or so
50 yrs old
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