The S&W M&P military revolvers produced from 1942 to 1944 had serial numbers with a "V" prefix, and were known as the Smith & Wesson Victory Model. Early Victory Models did not always have the V prefix. During World War II 590,305 of these revolvers were supplied to the United Kingdom, Canada, Australia, New Zealand, and South Africa under the Lend-Lease program, chambered in the British .38/200 caliber already in use in the Enfield No 2 Mk I Revolver and the Webley Mk IV Revolver. Most Victory Models sent to Britain were fitted with 4-inch or 5-inch barrels, although a few early versions had 6-inch barrels. The 5-inch barrel was standard production after 4 April 1942. The Office of Strategic Services (OSS) supplied thousands of these revolvers to resistance forces. Thousands of Victory Model revolvers remained in United States Army inventories following World War II for arming foreign military and security personnel.