No such model number in the S&W line.
If this number is on bottom of barrel it is the serial number of the gun. Smith & Wesson maintains a database and will answer questions about a particular gun for a rather large fee. additionally, someone online might know the answer, BUT
you need to include detailed information on ALL markings on the gun.
smith and Wesson (smith & Wesson) and Sig-Sauer
what year did smith&wesson start making the s&w40v
smith and wesson.
S&w
You can call S&W or find the answer in a copy of the Standard Catalog of Smith and Wesson
No such S prefix sn.
Call S&W, they will tell you.
Send it to S&W
No
Contact S&W or get a copy of Standard Catalog of Smith and Wesson by Supica and Nahas.
A shotgun made for Smith and Wesson, sold under the Smith and Wesson name.
Call Smith and Wesson and they will tell you. You will be in the early 80's time frame.