The Seamaster Aqua Terra is a superb tribute to OMEGA’s rich maritime heritage. This 41mm model has a symmetrical polished-brushed case in stainless steel and 18K Sedna™ gold, and a screw-in caseback with a wave-edged design. The silvery sun-brushed dial has a horizontal “teak” pattern inspired by the wooden decks of luxury sailboats, which is a signature feature of these models. Keeping track of the hours, minutes and seconds are facetted hands in 18K Sedna™ gold, filled with white Super-Lumi Nova. Days are marked by a date window at 6 o\'clock. Matching perfectly with the case is a stainless steel and 18K Sedna™ gold bracelet. Powering the watch is OMEGA’s Master Chronometer calibre 8900 - certified at the industry’s highest level by the Swiss Federal Institute of Metrology (METAS).Calibre Omega 8900: Self-winding movement with Co-Axial escapement. Certified Master Chronometer, approved by METAS, resistant to magnetic fields reaching 15, 000 gauss. Free sprung-balance with silicon balance spring, two barrels mounted in series, automatic winding in both directions. Time zone function. Special luxury finish with rhodium-plated rotor and bridges with Geneva waves in arabesque. FEATURESAnti-Magnetic: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1. 5 tesla (15, 000 gauss).Automatic Watch: A self-winding watch or automatic watch uses a mechanical movement whose main spring is wound automatically by the natural motion of the wearer\'s arm. Chronometer: Label given to a watch which has undergone precision tests and received a certificate from an official body (COSC).Date: The day of the month, displayed in a window on a watch dial at the 3 or 6 o’clock position, or within a subdial at 9 o\'clock. Master Chronometer Certified: Guaranteeing the Swiss industry’s highest standard of precision, performance and magnetic-resistance, as set by the Swiss Federal Institute of Metrology (METAS).Screw-In Crown: Self-locking crown, screwed into the tub