Pre-owned OMEGA Seamaster Diver 300M ref 210.30.42.20.01.010 (2025) debuted in 2024 as part of a highly anticipated duo of no-date Seamaster Diver 300M watches, which included a curious all-silver steel and titanium model and the Omega 210.30.42.20.01.010 for sale here in stainless steel and with a black dial and bezel. Both are available on the mesh-link bracelet, a first for a regular production model and, hopefully, nowhere near the last. Furthermore, at the heart of each model is the caliber 8806 self-winding Master Chronometer, which we can view through the exhibition-style case back. We expect the Omega 210.30.42.20.01.010 to be a top choice among collectors with its classic black and silver dive watch design codes. It sports a 42mm stainless steel case rated waterproof up to 300 meters, a black oxalic anodized aluminum bezel with a white Super-LumiNova diving scale, and a matching black aluminum dial with laser-engraved waves, rhodium-plated hands and hour markers, and more Super-LumiNova.