The OMEGA Seamaster Diver 300M Chronograph Ref. 210.30.44.51.03.001 is a 44 mm stainless steel dive chronograph with a matching steel bracelet and foldover clasp. Its polished blue ceramic dial features laser-engraved waves, large luminous markers, and a bi-compax chronograph layout with a small seconds subdial at 9 o’clock, and a combined 12-hour and 60-minute recorder at 3 o’clock. Framing the dial is a unidirectional rotating bezel crafted in blue ceramic with a white enamel diving scale. The domed sapphire crystal has anti-reflective treatment on both sides. Powered by the Co-Axial Master Chronometer Calibre 9900, this METAS-certified movement delivers 60 hours of power reserve and features a column wheel, vertical clutch, and resistance to magnetic fields up to 15,000 gauss. A transparent sapphire caseback reveals Geneva waves in arabesque across the rhodium-plated rotor and bridges. Additional features include a helium escape valve, screw-in crown, and 300 meters of water resistance, maintaining the professional specs expected of the Diver 300M line.