Authentic Tudor Black Bay 41. Blue sapphire crystal resistant to scratches. Polished and satin steel case featuring a unidirectional rotating bezel with anodized aluminium insert. Blue dial complemented by blue leather strap fitted with deployment clasp. Equipped with automatic self-winding mechanical movement (MT5602 Manufacture TUDOR COSC certified chronometer). Offers 70 hours power reserve. Secure screw-down winding crown. Solid case back design. Water resistant to 200 meters / 660 feet.