Omega Seamaster Planet Ocean Ultra Deep

The Omega reference 215.30.46.21.03.001 is the Omega Seamaster Planet Ocean Ultra Deep 6000M, a professional-grade dive watch derived from the technology Omega developed for the historic Five Deeps Expedition. Crafted from Omega’s proprietary O-MEGASTEEL, the watch features a substantial 45.5 mm case, a striking blue gradient dial, and a black ceramic bezel with a Liquidmetal diving scale. Its defining achievement is an extraordinary 6,000-meter (20,000-foot) water-resistance rating, meeting the ISO 6425:2018 standard for saturation-diving watches, making it one of the most capable serially produced dive watches ever created. Inside is the automatic Master Chronometer Calibre 8912, offering METAS-certified precision, resistance to magnetic fields up to 15,000 gauss, and a 60-hour power reserve. A domed sapphire crystal, robust steel bracelet, and no-date dial layout emphasize durability and legibility under extreme conditions. Despite its formidable engineering, the Ultra Deep retains a refined aesthetic with polished and brushed surfaces that elevate it beyond a pure tool watch. As a result, the 215.30.46.21.03.001 stands as a remarkable blend of cutting-edge ocean-exploration technology, modern horology, and everyday wearability for collectors who appreciate both technical achievement and distinctive design.