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 an design.This 44 mm chronograph model is crafted from 18K Sedna? gold and includes a laser-ablated black ceramic bezel ring with a polished diving scale. The pushers are also polished black ceramic, as well as the dial, which features laser-engraved waves in a positive relief and a date window at 6 o'clock.The subdial rings and hands are in 18K Sedna? gold, while the central hands and indexes are 18K Sedna? gold and filled with white Super-LumiNova.The watch is presented on a rubber strap and is driven by the OMEGA Master Chronometer Calibre 9901, which can be seen through the sapphire-crystal on the wave-edged caseback.