Luminescent hands and indexes are hand-applied and provide excellent visibility in the dark or underwater. Water resistant to 300m: 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. Hand-applied polished faceted indexes. Monochrome TAG Heuer logo. Grande Date' display at 6. Polished screw-in crown. Dial with horizontal steak effect. Diamond shaped hands with polished facets. Screw-in case back with a special diver decoration. Two counters. Unidirectional bezel measures time limits and is and essential safety feature. Any accidental movement of the bezel can only reduce the indicated remaining time.