OMEGA Seamaster Planet Ocean Ultra Deep Summer Blue Watch 215.30.46.21.03.002

The OMEGA Seamaster Planet Ocean Ultra Deep Summer Blue 45.5mm (Ref. 215.30.46.21.03.002) descends directly from the Five Deeps Expedition concept watch that reached the deepest point on Earth in 2019, with the production version water-resistant to 6,000 metres and meeting ISO 6425:2018 saturation diver standard as certified by METAS. The blue dial is an accurate topographical representation of the Challenger Deep, the deepest point in the Mariana Trench, mapped by the Five Deeps team using nearly one million sonar points and finished by allowing lacquer to flow freely across the surface, creating genuine depth and variation. A UV light reveals “OMEGA WAS HERE” with the Western, Central and Eastern Pools marked, pointing toward the record 10,935-metre dive.

At 45.5mm with 18.12mm thickness through O-MEGASTEEL case and bracelet, OMEGA’s proprietary high-performance alloy developed for the Ultra Deep project, this provides commanding presence in a material engineered specifically for extreme depth applications. The domed protuberant sapphire crystal with anti-reflective treatment on both sides accommodates the pressure differentials encountered at extreme depths whilst the unidirectional rotating bezel and screw-in crown maintain structural integrity throughout.

The Co-Axial Master Chronometer Calibre 8912 delivers 60-hour power reserve with 15,000 gauss magnetic resistance through METAS certification whilst the free-sprung balance with silicon balance spring and two barrels mounted in series provide consistent power delivery. The time zone function adds practical utility whilst the Geneva waves finishing on the rhodium-plated rotor is visible through the commemorative caseback featuring laser-engraved Poseidon with trident flanked by OMEGA’s 1956 original seahorse emblem and the current design.

The O-MEGASTEEL bracelet with foldover clasp, comfort setting, and diver extension accommodates wetsuit wear whilst the 6,000m water resistance is the deepest rating of any production OMEGA. The sonar-mapped dial and Five Deeps provenance make this the most technically and historically grounded diving watch in the current OMEGA catalogue.

Explore our full collection of used OMEGA watches.