9S MECHANICAL MOVEMENT
AUTOMATIC 3-DAY POWER RESERVE
The successor movement to the caliber 9S54, the caliber 9S64, has improved in duration from about 50 hours to about 72 hours (about 3 days), and the torque gradually decreases, making it more stable. You can now achieve accuracy.
By integrating the train wheel receiver and covering the movement, it is finished in a beautiful appearance with a sense of stability and unity unique to a hand-wound movement.
Note: This accuracy is the result of measuring the loss/gain of the time for seventeen days before the inside movements of the watch are put in the case. The measurement has been done in the factory where temperatures or position of the movements are controlled.
What makes 9S Mechanical special?
The concept of Grand Seiko was born from the desire to build the world's best watch, and the collection continues to push precision in mechanical watches to the limits of timekeeping technology.
As a true manufacture, Grand Seiko incorporates the latest technology alongside its breadth of craftsmanship to raise the art of watchmaking to its peak.