The Oris Aquis Date Calibre 400, reference 01 400 7790 4135-07 8 23 02PEB, features a 43.50 mm stainless steel case with a ceramic minutes scale top ring. It is powered by the in-house Calibre 400 automatic movement, offering a 120-hour power reserve. The watch has a blue dial, sapphire crystal with anti-reflective coating, and a stainless steel bracelet with a quick-adjust clasp system. Water resistance is rated at 300 meters. Additional features include a date window at 6 o'clock and a see-through sapphire case back.