It was with OMEGA’s maritime legacy in mind that the brand launched its Planet Ocean line in 2005. Today, the stylish OMEGA Seamaster Planet Ocean 600M Master Chronometer pays homage to OMEGA’s dive watch heritage. This model, with its scratch-resistant sapphire crystal, features a blue ceramic dial with Arabic numerals and a date window at the 3 o’clock position. The blue ceramic unidirectional bezel with OMEGA Ceragold™ diving scale is mounted on a 43. 5 mm 18K Sedna™ gold case. Other features include an alveol screw-in caseback and a blue leather strap with rubber lining and an 18K Sedna™ gold clasp. The OMEGA Seamaster Planet Ocean 600M Master Chronometer is water resistant to 600 metres / 2000 feet / 60 bar, and has a helium-escape valve. The OMEGA Master Chronometer calibre 8901 at the heart of this timepiece can be seen through the transparent caseback. To achieve Master Chronometer status, it has passed the 8 rigorous tests set by METAS (The Swiss Federal Institute of Metrology).Calibre Omega 8901: Self-winding movement and co-axial escapement. Certified by METAS as a Master Chronometer, insensitive to magnetic fields of up to 15, 000 Gauss. Free balance spring with spiral spring made of silicon, two barrels installed one behind the other, automatic double-sided winding. Time zone function. 18K Sedna ™ gold rotor and balance bridge and luxurious finish with Geneva stripe arabesques. FEATURES Anti-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. Helium Escape Valve: Decomp