The luminous enhancement of the Type 5 L is paired to the Ressence oil-filled upper chamber. The oil cancels out light refraction and makes the watch readable from any angle, providing a clear and crisp display that is essential for divers. The extra luminescent dial further boosts this legibility. The watch meets the rigorous ISO 6425 standard required for underwater exploration, is water-resistant up to 100 meters, and has also passed tests of magnetic and shock resilience. The robust Grade 5 titanium construction guarantees durability while maintaining a lightweight profile. It features the unidirectional rotating bezel with an easy-to-grip tactile design, allowing for precise and reliable adjustments. Additionally, every Type 5 caseback deploys the Ressence Compression Lock System (RCLS), a mechanism which enables wearers to lock the compression gasket for waterproofing.
