It appears the 5 inch barrel was replaced with a proper 2inch. I have the history of the gun provided by Roy Jinks the Smith and Wesson historian ( provided for a fee ). The gun shoots fine and is accurate at 25yds which is all I expect for handgun engagements. I carried a former German Army P-38 when an aircrew in Vietnam and it was only for up close and personal situations in case I was down and in the escape and evasion mode. I am presently searching for a replacement 5 inch barrel of the proper age to make the gun ” correct”.