Seamaster Planet Ocean 600M Chronometer

From the retailer listing

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 polished black ceramic dial with Arabic numerals and a date window at the 3 o’clock position. Mounted on the 43.5 mm stainless steel case, is the world's premiere black ceramic bezel with orange rubber. The diving scale of the bezel is crafted with Liquidmetal™. Other features include an alveol screw-in caseback and a black structured rubber strap with orange stitching and lining. 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 8900 at the heart of this timepiece can be seen throu