Pre-owned/unworn Omega Seamaster Planet Ocean 600M ref 215.30.46.51.99.001. The Planet Ocean collection has represented the more aggressive and technically advanced side of the Seamaster family since its introduction in 2005, combining professional dive-watch capability with contemporary styling and cutting-edge materials. Chronograph references like this one push that concept even further, delivering oversized proportions, bold detailing, and serious mechanical complexity all within a purpose-built dive watch platform. The example you see here pairs brushed stainless steel with a ceramized titanium dial, giving the watch a distinctly modern and almost industrial appearance on the wrist. Bright orange ceramic accents around the bezel and chronograph pushers add the signature Planet Ocean color contrast collectors immediately recognize from the collection. The tri-compax-inspired chronograph layout, broad hands, and oversized case construction all reinforce the watch’s highly technical personality. Shop OMEGA Seamaster Collection