A new addition to the Grand Seiko Sport collection and not the least addition. With 40.5 mm, this model falls beautifully on the wrist. No oversized sport/dive watch make a nice size. Luminova on the hands, Spring Drive with 72 hours power reserve.
"Automatic spring drive 3-day GMT"
In 2006, just two years after the completion of Calibre 9R65, the first 9R Spring Drive movement of Grand Seiko with GMT function, the Calibre 9R66, was unveiled. "GMT" stands for Greenwich Mean Time, and uses a 24-hour hand (GMT hand) as the fourth hand on the dial next to the hour, minute and second hands.