Luminescent hands and indexes are hand-applied and provide excellent visibility in the dark or underwater. Water resistant to 300 meters: a proof of ultimate resistance; ensured by rigorous manufacturing standards and strict testing. Fine brushed /polished steel case. 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. Hand-hand applied polished faceted indexes. Monochrome TAG Heuer logo. Polished screw-in crown. Diamond shaped hands with polished facets. Screw-in case back with special diver decoration. Dial with two distinct zones and sunray effect. Unidirectional turning bezel measures time limits and is an essential safety feature. Any accidental movement of the bezel can only reduce the indicated remaining time. Date window at 3 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.