Oris ProDiver

Oris's professional deep-diving line, sitting above the Aquis and Divers, and now discontinued. The ProDiver was serious kit: a full titanium 49mm case rated to 1000m, a patented rotation-safety bezel lock, and Date, GMT, and chronograph versions. Big, purposeful, and over-engineered for real saturation diving rather than the desk. Pre-owned only today, and the one to look at if you want Oris's most hardcore diver.