on one side of the grips there should be a screw. take the screw out nad the grips will come off
What model?
Loosen the grip screws.
Best source of information is the Standard Catalog of Smith and Wesson, 3rd edition.
With no more than that to go on, the best I can give you is a range of 300-3000
You can request an owner's manual for free at S&W's website.
No
Frame and bottom of grip
One has been.
CHeck with the maker of the grip.
Not likely
No
Can't be answered without a DETAILED description of ALL markings, barrel length, finish, grips, sights, box, accessories, papers, condition.