Omega Seamaster Diver 300M Watch, 43.5mm Black Dial, 210.92.44.20.01.003Since 1993, the Seamaster Professional Diver 300M has enjoyed a legendary following. OMEGAs 21st century models stay true to the originals dive watch design, while introducing exciting new materials and movements. On this 43. 50 mm model, black ceramic [ZrO2] dominates. The case, bezel, wave pattern dial, crown and helium escape valve, all in the same striking material, give the watch a very distinctive, uniform and sculptural look. To ensure