Since 1993, the Seamaster Professional Diver 300M has enjoyed a legendary following. Today’s modern collection has embraced that famous ocean heritage and updated it with OMEGA’s best innovation and design. The case of this 43. 5 mm model is crafted from black ceramic and grade 5 titanium and includes a black ceramic bezel with a white enamel diving scale. The dial is also brushed black ceramic [Zr O2] and features laser-engraving to create raised waves. The skeleton hands and raised indexes in PVD titanium are filled with white Super-Lumi Nova, while the helium escape valve has been given a conical design. The watch is presented on an integrated black rubber strap with a polished-brushed black ceramic [Zr O2] buckle, and is driven by the OMEGA Master Chronometer Calibre 8806, which can be seen through the sapphire-crystal on the wave-edged caseback. Calibre Omega 8806: Self-winding movement with a Co-Axial escapement. Certified Master Chronometer, approved by METAS, resistant to magnetic fields reaching 15, 000 gauss. Free sprung-balance with silicon balance spring, automatic winding in both directions. Special luxury finish with rhodium-plated rotor and bridges with Geneva waves in arabesque. FEATURESAnti-magnetic: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1. 5 tesla (15, 000 gauss).Automatic watch: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1. 5 tesla (15, 000 gauss).Ceramic watch: A casebody created from a single block of pressed ceramic, which is first heated in an oven and then three-dimensionally machined. OMEGA\'s ceramic watch cases are extremely scratch-resistant and shock-resistant. Chronometer: Label given to a watch which has undergone precision tests and received a certificate from an official body (COSC).Helium escape valve: Decompression system which allows helium to escape from inside the watch when the watch is worn for professional use in pressure chambers. (Long-term u