Welcome to the Forum.
"I thought it was a Liberty model gun..." By now, I presume you realize the correct term is Victory model, not Liberty model. Keep reading this forum and you will learn A LOT about S&Ws.
"Some additional info that may help........I just spoke with a buddy of mine who is also a Garand Collector and he and I were discussing S & W Victories and he said he had forgotten all about the one his father-in-law gave him years ago. So he pulls it out of the old nightstand where it has resided for years and he gave me the following info (pictures coming over the weekend). 38 S&W Ctg on barrel (38-200), s/n V 337660, top strap U.S. Property GHD, butt, cylinder, barrel all matching, NO British Proofs anywhere, 5 inch, Black Magic finish. Known for a fact that it was not ever sent to England because his father-in-law was US Navy and departed as Captain of a Navy Vessel taking part in D-Day in late 1943. Carried this Victory to the end of the war, brought it home, set in the house ever since."
It seems a bit odd to me that a US Naval officer would be issued a .38 S&W revolver, as opposed to receiving a 4" .38 special.