Depends on when it was made and in what configuration. You provide no description of markings, so, impossible to tell.
Depends on the model. Look in the crane area.
Read the one on the butt.
You can not tell the model number with just the serial number.
behind the celinder
Impossible to answer with the information given.
No way to answer without the serial number.
You will have to find a copy of The Standard Catalog of Smith and Wesson and check each model number.
Your question cannot be answered without you providing the serial number to your model 586 Smith and Wesson revolver.
The value of a Smith and Wesson Model 51 22 Magnum Revolver would actually depend on a number of factors. Some of these factors would include the age and condition of the Revolver.
Can't tell model number from just the serial number.
If the serial number is J75635 then your Smith and Wesson model 36,J frame revolver was made between 1979-1980.
What is the value of a model 24 Smith & Wesson revolver with a 4" barel? It has never been fired.