Authentic Tudor Black Bay GMT watch with model number M79830RB-0010. Features a brushed and polished stainless steel case combined with a riveted stainless steel bracelet equipped with a folding clasp. The bezel incorporates bi-directional rotation on matte burgundy or blue inserts. Boasts an opaline dial accented by luminous silver tone hands and hour markers, including circle/index symbols and minute gradations along the outer rim. Powered by Tudor's COSC-certified Manufacture Calibre MT5652 automatic movement with a 70-hour power reserve indicator. Functions include date display, GMT dual time zone capability (via 24-hour hand), seconds, minutes, hours. Includes scratch-resistant sapphire crystal glass. Round case measures 41mm in diameter and is water resistant to 200 meters (660 feet). Comes with a five-year WatchMaxx warranty.