A Simple and Compact Spring Drive, at its most elegant This simply finished model with no crown guard is driven by Grand Seiko’s unique Spring Drive caliber, which combines the motive force of a mainspring with the high precision of a quartz watch. With a case size under 40mm, the watch adorns the wrist with an elegant subtlety that gives its wearer a premium feel. The slender shape of the raised indices complements the sharpness of the power reserve indicator, while the clear expanse of the dial combines with the smooth movements of Grand Seiko's original second hand.
Case: Stainless steel, high definition dual-curved sapphire crystal
Case diameter: 39.00mm
Case thickness: 12.30mm
Dial: Black dial, date window, power reserve indicator
Strap: Stainless steel bracelet
Movement: Spring Drive Caliber 9R65
Power reserve: 72 hours ±1 per day (±15 seconds per month)