Experience Grand Seiko and discover The Spirit of Takumi with our concierge by emailing Boutiques.USA@grand-seiko.us.com

More

9R SPRING DRIVE MOVEMENT

MANUAL-WINDING SPRING DRIVE

Caliber 9R31

MANUAL-WINDING SPRING DRIVE

Caliber 9R31

A manual-winding Spring Drive from Shinshu Watch Studio with the same concept as Caliber 9R02.

Created at the same time as Caliber 9R02 from Micro Artist Studio, Caliber 9R31 has Dual-Spring Barrel with two mainsprings set in parallel within a single barrel, to deliver a power reserve of 72 hours.

SPECIFICATIONS

Winding mechanism

Manual winding

Accuracy

±15 seconds per month(±1 second per day)

Power reserve

Approximately 72 hours

Number of jewels

30 jewels

Features

-Dual-Spring Barrel
-Power reserve indicator

What makes 9R Spring Drive special?

Spring Drive, one of the great innovations in modern watch making history, regulates a spring-driven movement with state-of-the-art electronic technology that functions without batteries or other external power source. Its sole power source is a mainspring, which drives a series of gears. A rotor, connected to the end of these gears, generates a small electrical charge that activates an electronic circuit and quartz oscillator. Its accuracy is unprecedented for a watch wound by a mainspring. The development of the 9R Spring Drive movement was possible only because Grand Seiko is one of the few manufacturers with expertise in both mechanical and electronic watches.

CALIBER 9R31 MODELS

9R SPRING DRIVE MOVEMENT

Caliber 9R31 | SPRING DRIVE | MOVEMENT | ABOUT | Grand Seiko