Luminescent hands and indexes are hand-applied and provide excellent visibility in the dark or underwater. Water resistant to 300 meters: a proof f ultimate resistance; ensured by rigorous manufacturing standards and strict testing. This timepiece features a date window at 3 o'clock, roman numeral 12 and the TAG Heuer logo. Built with 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. Oversize screw in crown with double gaskets make this watch easy to hold and ensure water resistance to 300 meters. The unidirectional bezel measures time limits and is an essential safety feature. Any accidental movement of the bezel can only reduce the indicated remaining time. 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.