Date window at 3 o'clock. Luminescent faceted hands and indexes are hand applied and coated with luminescent material for enhanced visibility in the dark or underwater. 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. Screw-in crown with "easy grip" system and double gaskets. Water resistant to 200 meters; ensured by rigorous manufacturing standards and strict testing. 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.