Grand Seiko Sport Spring Drive Diver's 200m SBGA231G 44.2 mm Titanium Watch for Men

A diver's watch from Grand Seiko's Sport Collection, the SBGA231G is driven by the Spring Drive calibre 9R65, which pairs the power of a mainspring with the precision of quartz regulation. The 44.2 mm case and the bracelet are made of High-Intensity Titanium, so the watch weighs just 137 g, about 30% lighter than an equivalent in stainless steel, while resisting scratches and corrosion.

It is water resistant to 200 m as a diver's watch, with a unidirectional rotating bezel, a screw-down crown and LumiBrite on the hands and indices for legibility in low light. Grand Seiko designed the bezel to be removable for maintenance and shaped the area around the crown so that sand, dirt or seawater can be rinsed off easily. Zaratsu-polished mirror surfaces and multi-faceted indices keep the finish unmistakably Grand Seiko. A power reserve indicator shows the remaining running time of up to 72 hours.

Technical specifications

• Brand: Grand Seiko
• Collection: Sport Collection
• Reference: SBGA231G
• Case: High-Intensity Titanium, 44.2 mm diameter, 51.0 mm lug-to-lug, 14.0 mm thick
• Crystal: Sapphire crystal with anti-reflective coating on the inner surface
• Caseback: Screw case back
• Water resistance: 200 m / 660 ft diver's
• Dial: LumiBrite on hands and indices
• Functions: Hours, minutes, seconds, date, power reserve indicator
• Bezel: Unidirectional rotating bezel
• Movement: Grand Seiko Spring Drive calibre 9R65, self-winding with manual winding
• Power reserve: Approx. 72 hours (3 days)
• Accuracy: ±15 seconds per month (±1 second per day)
• Jewels: 30
• Magnetic resistance: 4,800 A/m
• Weight: 137 g
• Bracelet: High-Intensity Titanium, 22 mm band width, 196 mm maximum perimeter
• Clasp: Three-fold clasp with secure lock and extender
• Warranty: 5-year Grand Seiko worldwide warranty (Kamal Watch Co. is an authorised Grand Seiko Mastershop)