Depth and Precision The Sea-Dweller was created for the most demanding underwater environments, a professional-grade instrument that has earned its place in the history of deep-sea exploration. This 40mm model continues that tradition, combining strength with uncompromising accuracy. Its Oystersteel case and black dial reflect a heritage of resilience and clarity beneath the waves. Professional Assurance Equipped with a rotatable 60-minute bezel and Fliplock Oysterlock clasp, this reference is designed for security and functionality. Powered by the calibre 3135 with a 48-hour power reserve, it remains a trusted companion for those who value performance and endurance.