Answering the call of diving enthusiasts who demand an exacting timepiece that is robust as well as refined, Swiss watch Brand TAG Heuer unveiled its new Aquaracer 500M series in 2009. Whether worn while swimming along the Great Barrier Reef or exploring the underwater caves of Turks & Caicos, these watches take serious sports-inspired functionality to a new extreme.

TAG Heuer's Aquaracer 500M with blue dial and stainless steel bracelet.

Water resistant to 500 meters, each model in the Aquaracer 500M collection is equipped with the definitive attributes of a high-performance diving watch, including a unidirectional turning bezel that ensures precise elapsed dive-time measurement. Highly luminescent markers on the hands and indexes, as well as an orange-tipped second hand, provide at-a-glance readability under water or in dim light. Additionally, the sapphire crystal and caseback are scratch-resistant and anti-reflection treated for optimum visibility.

To prevent damage to the watch and its movements, the Aquaracer 500M features an automatic helium valve that releases, upon decompression, any gases that infiltrate the watch during a deep dive. A fine-brushed, screw-in crown with double safety gaskets further protects the timepiece from water or dust penetration.