Pre-owned/unworn OMEGA Seamaster Planet Ocean 600M ref 215.92.46.22.99.002. The Planet Ocean collection has evolved far beyond a traditional dive watch line since its introduction in 2005, with Omega increasingly using it as a platform to showcase some of the brand’s most advanced materials and movement technology. This reference sits near the top of that modern evolution, combining GMT functionality with an ultra-lightweight construction that feels noticeably different from a conventional steel sports watch on the wrist. The 45.5mm case is made from Silicon Nitride ceramic, an extremely lightweight and durable material that helps reduce the overall heft typically associated with large professional dive watches. Omega complements the dark matte case with sandblasted grade 5 titanium details on the dial, bezel, and helium escape valve, creating a stealthier and more technical aesthetic than the standard Planet Ocean lineup. Bright orange accents provide contrast throughout the dial while reinforcing the collection’s sporty identity. Shop OMEGA Seamaster Collection