45.5MM AquisThe Oris Aquis Small Second Date 45. 5mm is a robust Swiss dive watch designed for performance and legibility. It features a deep blue dial with a small seconds subdial at 9 o'clock and a date window at 3 o'clock. The watch is powered by the Oris Caliber 743 automatic movement, offering a 41 hour power reserve. Its 45. 5mm stainless steel case is water resistant up to 500 meters (50 bar) and is complemented by a unidirectional rotating ceramic bezel.