An automatic helium escape valve allows trapped helium gas to safely exit the watch during decompression in deep saturation diving, preventing internal pressure buildup. This protects the crystal and seals from damage, ensuring the watch maintains its integrity in extreme underwater conditions.

Offers a power reserve of over 40 hours when fully wound, ensuring reliable performance even when not worn for extended periods. This allows the watch to keep accurate time through a full day and beyond without needing rewinding.

Swiss Super-LumiNova luminous material used for deep sea visibility applied to the hands and indices, enabling clear visibility in low-light and underwater conditions Using X1 C3 Grade Swiss Super-LumiNova, delivers exceptional brightness with up to 60% higher glow intensity after two hours compared to standard grade, ensuring maximum visibility and longer-lasting legibility in deep, low-light environments.

A unidirectional rotating bezel is a bezel that turns in only one direction (counterclockwise) and is used by divers to track elapsed dive time. Aqua Lock present on the 500M Diver’s watch prevents accidental movement of the bezel underwater.