The assembly that holds the cylinder
Open the cylinder and look inside on the frame where the crane assembly rests.
Depends on the model. Look in the crane area.
Inside the crane or on the slide
It it has one, it will be inside the crane area.
It will be on the bottom of the hand butt, or inside the cylider crane area.
careful examination of barrel, butt, crane, receiver.
What is the value of my 1955 smith & wesson 45 target master revolver?
Open the cylinder and look at the frame that is usually hidden by the crane. The serial number is stamped on the frame.
Standard Catalog of Smith and Wesson.
A fine revolver.
Realistically, you can't. If you give the sn, the best you will get is range of models. If it has a model number, it will be stamped on the revolver inside the frame by the yoke/crane assembly.
email the serial# to smith & Wesson and they will respond with the date