Grand Seiko Heritage

A Simple and Compact Spring Drive, at is most elegant

This simply finished model with no crown guard is driven by a 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.

The dial makes use of Grand Seiko technology to effect a deep silver finish, giving off a radial sheen that projects a lustrous sense of depth. 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.

Exterior
Case Material : Stainless steel
Glass Material : Dual-curved sapphire crystal
Glass Coating : Anti-reflective coating on inner surface
Case size : Diameter 39mm × Thickness 12.3mm
The perimeter of Band : 201mm
Clasp type : Three-fold clasp with push button release

Movement
Caliber no. : 9R65 Instructions
Movement Type : Spring Drive
Power reserve : Approx. 72 hours(3 days)
Accuracy : ±1 second per day / ±15 seconds per month (average)

Functions
Water resistance : 10 bar
Magnetic resistance : Equipped
Weight : 148.0 g
Other details / Features :
・30 jewels
・Case back with lion emblem
・Date display
・Power reserve display
・Screw case back
・Screw-down crown
・Stop second hand function