Grand Seiko Sport

The Grand Seiko Sport, reference SBGH257, has a 46.9 mm titanium case and is a limited edition of 500 pieces. Self-winding calibre 9S85 has 37 jewels and approximately 55 hours of power reserve. The watch has a date display; LumiBrite is applied to the hands and indices. Measuring 50.8 mm lug-to-lug, the case is 17 mm thick; the bezel rotates unidirectionally; the case has a screw-down crown. A titanium bracelet closes with an extension clasp with folding lock. Movement precision is +5 to -3 seconds per day; above the dial is a sapphire crystal.