Open the cylinder and look at the frame that is usually hidden by the crane. The serial number is stamped on the frame.
No such serial number in Smith and Wesson data.
Check the butt.
1980
1974
1980
No serial number provided. Serial # 426742
You can not tell the model number with just the serial number.
You will have to provide the serial number and a detailed description of the weapon.
Look on the butt of the revolver.
On the butt.
@1969
Impossible to answer without the serial number.