If it is a semi-auto and made after 1957 it will be on the frame. I.E., Model 39 or Model 645-2. If by pistol you mean a revolver, you will have to open the cylinder and look in the recess where the crane/yoke rests.
it is a Model 39-2 9mm pistol
Smith&Wesson model 14
Smith and Wesson 6909 Stainless steel semi-auto pistol stopped produvtion in 2001
A fine pistol.
Smith and Wesson 9mm Model 39-2 Chrome finish.
No such model number.
No
No such model in the S&W line.
In order to answer your question correctly,I would need you to Identify your Smith and Wesson airweight pistol more.I would need the model number and serial number along with the overall condition of your firearm to give you a accurate value to your question.
Impossible to know the exact model from just the sn.
100-1200 USD
Made 1960-1974