The Grand Seiko “Ushio” UFA 300 Diver is a professional dive watch housed in a 40.8 mm titanium case measuring 12.9 mm thick, paired with a ceramic bezel, sapphire crystal, and 300 m water resistance. It is powered by the new Spring Drive Calibre 9RB1, an automatic movement delivering 72 hours of power reserve and an exceptional ±20 seconds per year accuracy, earning the “U.F.A.” (Ultra Fine Accuracy) designation.
The watch is available in blue or green, with large Lumibrite-filled hands and indices following the Evolution 9 design language. The titanium bracelet also comes with a micro-adjustment and a wetsuit extension,.