GUU-1/P holster is a Vietnam War-era U.S. Air Force issue designed specifically for the Smith & Wesson Model 15 Combat Masterpiece revolver, a .38 Special with a 4-inch barrel. These holsters were typically made of black leather and featured a swivel tab and securing strap, allowing them to be worn either on a belt or as part of a shoulder rig favored by aircrew and security personnel. Manufacturer was J.M. Bucheimer Co. and the year of manufacture 1970 This was used by the Air Police, Security Police, pilots, and other aircrew.