With a four-digit serial, your Victory would be from about June 1942, not too long after the start of V-prefix production.

Guns shipped to Britain normally were the 5” British Service model in .38 S&W. But 4” US models also ended up in Britain, so if your gun says 38 S&W SPECIAL CTG on the barrel, that’s what it likely is. Is anything stamped on the topstrap, or the butt besides the serial?