Pre-owned Omega Seamaster Planet Ocean ref 215.30.44.21.01.001 (2021) hails from the collection that was originally developed in 2005 and that remains a fixture of the Omega catalog. It is widely sought-after by collectors of all professions, lifestyles, and budgets for its fashion-forward and functional design ethos. The example you see here pairs the stainless steel finish with a black dial and bezel, a very popular dive watch design set. The case sports a scratch-resistant sapphire crystal, a black ceramic dial topped with Super-LumiNova, a matching black ceramic uni-directional time-lapse bezel, and a Helium Escape Valve. It can withstand up to 600 meters/2,000 feet below the ocean’s surface. Even more impressive is the movement, Omega’s caliber 8900 self-winding movement, which boasts the distinction of a Master Chronometer, a Co-Axial escapement, and a 60-hour power reserve.