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9R SPRING DRIVE MOVEMENT

AUTOMATIC SPRING DRIVE 3-DAY

Caliber 9R65

AUTOMATIC SPRING DRIVE 3-DAY

Caliber 9R65

Our company unveiled Spring Drive in 1998, but its lack of a sufficiently effective automatic winding mechanism and 72-hour power reserve prevent its adoption in the Grand Seiko line. After a further five years of development, the first Grand Seiko 9R Spring Drive was created.

The winding system and drive time were improved from the existing 48-hour manual winding system to an automatic 72-hour power reserve. The automatic winding mechanism uses Seiko's original Magic Lever mechanism developed in 1959, but with improved productivity, maintainability, and durability to enhance winding efficiency.

Caliber 9R65 is currently the most standard of the 9R Spring Drive movements, and is used in many Grand Seiko models.

SPECIFICATIONS
Driving system Automatic with manual winding mechanism
Accuracy ±1 per day (±15 seconds per month)
Power reserve Approximately 72 hours
Jewels 30 jewels
Remarks Power reserve display function

What is the Spring Drive?

Spring Drive is a unique watch technology that combines the power derived from a mainspring with the high accuracy of an electronic watch. Like all other mechanical watches, Spring Drive uses the energy generated by the movement of the wearer’s wrist to move the hands, but it also uses this to create electrical energy that powers a unique regulator that is up to ten times more accurate than any traditional escapement.

The Tri-synchro regulator combines three types of power:

1. Mechanical power (to generate and store energy in a mainspring)
2. Electrical power (to activate an IC and quartz oscillator)
3. Magnetism (to apply a brake to the hands via a rotor/stator)

The combined operation of these three functions delivers one second a day precision and gives Spring Drive its unique signature, the elegant glide motion of the second hand as it moves around the dial, accurately, smoothly and silently.

Spring Drive combines the best elements of both mechanical and electronic watches. While three-hand versions have over 200 components, versions with more functions, such as the Spring Drive chronograph have well over 300, all of which are assembled by hand.

LEARN MORE ABOUT SPRING DRIVE