Pre-owned/unworn Omega Seamaster Planet Ocean 600M ref 215.92.46.22.01.001 is made almost entirely from black ceramic, including the case, bezel, and dial, creating a look that feels far more architectural and modern than traditional steel dive watches. Omega even machines the case from a single block of ceramic, a process that highlights just how advanced the brand’s materials technology has become. The monochromatic design is broken up by subtle details like the Liquidmetal dive scale, white Super-LumiNova, and the GMT ring integrated into the dial, which allows the watch to track a second time zone without sacrificing legibility. Sized at 45.5mm, the Deep Black has undeniable wrist presence, but that larger size fits the bold concept well. Rugged, technical, and very modern, the Deep Black feels like one of the most forward-looking watches in the entire Seamaster family. Shop OMEGA Seamaster Collection