First - what caliber is stamped on the barrel?

V 564270 would indicate likely shipment in March or April 1944. The U. S. Property stamping would indicate it was Lend-Lease if it's the British version chambered in .38 S&W (AKA .380 Revolver Mk2), or simply that it was U.S. property if chambered in .38 S&W Special, as used by U. S. military forces. The initials should be G.H.D., not H.G.D. That inspection stamp stands for Colonel, later General, Guy H. Drewry, the commander of the U. S. Army Springfield Ordnance District.

Posting pictures might elicit a better assessment.