Tudor Heritage Black Bay Dark Automatic Mens Watch 79230DK-BKSS. Black PVD stainless steel case and bracelet. Uni-directional rotating black PVD bezel. Black dial with luminous silver-tone hands and dot hour markers. Minute markers around the outer rim. Tudor Calibre MT5602 automatic movement with a 70-hour power reserve. Scratch resistant sapphire crystal. Screw down crown. Solid case back. Case size: 41 mm. Round case shape. Deployment clasp. Water resistant at 200 meters / 660 feet. Functions: hour, minute, second, chronometer.