This is a Galco Belt Holster known as the Stinger, model SG652B.
Galco's Stinger(TM) belt holster was designed and made to carry a small semiautomatic pistol or double-action revolver behind the strongside hip. The Stinger's open top and forward cant allow a fast" easy drawstroke. Safety" security and stealth are all addressed with a covered trigger guard" deep molding and a tunnel-style belt loop that takes up little belt space compared to a pancake-type holster. The Stinger is constructed of premium saddle leather" fits belts up to 1 1/2" wide.
Features:
Premium steerhide
Tunnel belt loop uses minimal belt space
Butt-forward cant
Made for compact and subcompact handguns
Fits belts up to 1 1/2"