A British army veteran told me that the "Official" UK military nomenclature of the .38/200 British Service Revolver was "Pistol, Smith & Wesson, No. 2" The British Enfield .380 revolver (using the .380 MkI and MkII cartridges, same as the .38 S&W) was called the "Pistol, Revolver, No. 2". Go figure.