The OMEGA Seamaster Planet Ocean 600m Co‑Axial Master Chronometer is a 43.5 mm timepiece that pays homage to OMEGA's dive heritage. The Master Chronometer calibre 8900 at the heart of this timepiece can be seen through the transparent caseback, and is resistant to magnetic fields reaching 15,000 gauss. This watch also features a free-sprung sprung-balance with a silicon balance spring, two barrels mounted in series, automatic winding in both directions, a time zone function, and a pecial luxury finish with rhodium plated rotor and bridges with Geneva waves in arabesque. Has a power reserve of 60 hours.