The Aquis Date Calibre 400 43.5 mm is a landmark watch and the first to carry our game-changing in-house, antimagnetic, five-day automatic. We call it The New Standard. In the Aquis Date Calibre 400 43.5 mm, it?s wrapped in a stainless steel case and presented on a stainless steel bracelet with an innovative extendable clasp. It features a rotating bezel, screw-down crown, lumed details, and is water-resistant up to 30 bar (300 metres). The Oris Calibre 400 Series, a revolution in Swiss Made mechanical design, offers a five-day power reserve, high anti-magnetism, and 10-year service intervals. Watches with this movement have a 10-year warranty (with sign-up to MyOris). Truly, the new standard. Multi-piece stainless steel case, ceramic minutes scale top ring. Sapphire, domed on both sides, anti-reflective coating inside. Stainless steel, screwed, see-through sapphire glass. Size 43.50 MM Water Resistance 30BAR Interhorn Width 24MM Centre hands for hours, minutes and seconds, date window, instantaneous date, date corrector, fine timing device and stop-second 120 hrs Power reserve