Since 1993, the Seamaster Professional Diver 300M has enjoyed a legendary following. OMEGA’s 21st century models stay true to the original’s dive watch design, while introducing exciting new materials and movements. This 43. 50 mm model, cased in black ceramic [Zr O2] and Sedna™ gold, has a black ceramic dial with laser-ablated waves in positive relief. The polished Sedna™ gold indexes and facetted hands, filled with white Super-Lumi Nova, contrast beautifully with the black dial. Completing the look is an integrated black rubber strap with black ceramic buckle. The polished-brushed oriented caseback with wave-edged design features OMEGA’s patented NAIAD LOCK. Powering the watch is OMEGA’s Co-Axial Master Chronometer Calibre 8806. FEATURESAnti‑magnetic Chronometer Helium escape valve Master Chronometer Certified Screw‑in crown Transparent case back Unidirectional rotating bezel TECHNICAL DATABetween lugs: 21 mm Bracelet: rubber strap Case: Black ceramic Case diameter: 43. 5 mm Dial colour: Black Crystal: Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides Water resistance: 30 bar (300 metres / 1000 feet)