The Smith & Wesson pistol with serial number 688933 was produced in 1940. This serial number corresponds to a model from the company's lineup during that time period, likely a .38 Special revolver. For precise identification of the model, further details about the firearm would be needed.
No serial number = no answer.
Smith and Wesson is the make.
No serial number provided.
Not a valid S&W serial number.
1977
@1987.
1916
@1983
No serial number given.
Serial number.
Made @ 1981.
Look on the butt of the revolver.