Open flange design makes second easy to read. Specially luminescent hands and markers for extra visibility in the dark. Double security clasp bracelet with easy to use push buttons. Scratch resistant sapphire crystal for excellent durability. All TAG Heuer watches are fitted with sapphire crystal. This is cut from a polished slice of solid sapphire that has been created by the fusion and crystallization of alumina. Sapphire is so hard that only a diamond can scratch it. Thirteen diamonds on the dial, weighing 0.10 carat. In its jewelry models, TAG Heuer pays great attention to the criteria that make a diamond unique: its size, color,clarity and weight. Each stone is verified by gemologists before being set by hand using binoculars in strict accordance with professional standards. The setter first ensures that the diamonds are all identical in size and certifies that the table (the upper face of the stone) is parallel to the base. These principles are essential to the beauty and the quality of the setting and enable another inspection of the stones. The diamonds are then positioned in the claws machined into the steel or gold,and fixed onto the watch. TAG Heuer jewelry models all undergo rigorous quality testing. They are immersed in soapy water and subjected to ultrasound waves to ensure that the diamonds will not become accidentally detached. Crown stamped with the TAG Heuer logo. Water resistant to 50 meters; ensured by rigorous manufacturing standards and strict testing. Date display at three o'clock. The high level of TAG Heuer quality is founded on the rigorous choice and continuous monitoring of all its suppliers and their products. Throughout the manufacturing process, each component is subjected to numerous tests and controls designed to verify how carefully it has been made.