Engineered for Depth 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. Introduced in 1967, it pushed the boundaries of what a divers watch could achieve, combining strength with uncompromising precision. This 40mm model continues that legacy, its Oystersteel case and black dial reflecting a heritage of resilience and clarity beneath the waves. Professional Heritage 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 in equal measure.