I've got a lend-lease K frame with "V" serial number in .38 S&W (and love it!) but it, unlike yours T.H., is covered with British markings. There's a BNP proof mark on every charge hole and on the barrel, and "3 1/2 tons" stamped on the barrel breech.

I don't know what markings the commonwealth countries may have used, if any, and would be interested to know if your revolver ever left these shores and if so, to where? Not England, obviously.