Tracking three time zones with a mechanical Hi-Beat GMT 

Royal Jewelers is an authorized Grand Seiko dealer in the Boston area and offers the Grand Seiko SBGJ239 Sport with Grand Seiko's 5 year warranty.

With the globetrotter in mind, Reference SBGJ239 features a GMT hand, a 24-hour dial ring, and a bidirectional sapphire bezel that allows for tracking three time zones at once. The watch features a tough case construction with 20 bar water resistance and high resistance against shocks. The two-tone sapphire bezel provides a strong sense of depth to the look of the watch, and the green dial and brown leather strap create a sharp presence on the wrist. The large hands and indexes are filled generously with LumiBrite—a proprietary luminous compound—which is also featured on the bezel. Additionally, the high-quality sapphire glass on the surface of the bezel provides extra resilience against scratches. This model incorporates Caliber 9S86, a Hi-Beat movement running at 36,000 bph, an of accuracy +5 to -3 seconds a day, and a power reserve of 55 hours.