Smith and Wesson made hundreds of models, yours sounds like a small handgun from the early 1900's. try to Google a web site for gun collectors. in Canada they sell for $75 max, then $150 to $175 in the us, must be in excellent condition for these prices.
Need to know the caliber in order to answer.
Made @ 1964.
Requires hands on appraisal
Cannot be determined from just the serial number. Need a DETAILED description of ALL markings.
Your Description and serial number indicate that you have a Smith and Wesson model 30,or 31 which was made between 1961-1970.
K
You can get a letter from S&W for 50 USD
It could be one of many. Impossible to answer without knowing caliber.
$100-$450.
this question cannot be answered without you providing the model of your revolver,caliber,barrel length,along with the serial number.
200 or so
Without more of a description; 10-500 USD