welcome01 to the forums from the Wiregrass! Folks already told you pert much everything. Collectors know it as the British Service Revolver chambered for the .380/200 Webley cartridge. Basically, that was a .38 S&W with a 200 grain lead bullet. Your gun was built by S&W under contract with the UK before we entered the war. After we entered, it got a V prefix to the serial number as did all the .38 Special revolvers. .38 S&W ammo is still manufactured although you may not find it except at big box sports stores and it is more expensive than .38 Special.