Grand Seiko Heritage

A Spring Drive standard model that has had a strong following ever since its release. It was the first Grand Seiko watch to be powered by a Spring Drive, the third movement mechanism, combining the motive force of a mainspring found in mechanical watches with the high precision of a quartz watch. A Spring Drive watch that has had a strong following ever since its release. It was the first Grand Seiko watch to be powered by Spring Drive, Grand Seiko's unique caliber, which combines the motive force of a mainspring with the high precision of a quartz watch.

Exterior
Case Material : Stainless steel
Glass Material : Dual-curved sapphire crystal
Glass Coating : Anti-reflective coating on inner surface
Case size : Diameter 41mm × Thickness 12.5mm
The perimeter of Band : 195mm
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 : 150.0 g
Other details / Features :
・30 jewels
・Case back with lion emblem
・Date display
・Power reserve display
・Screw case back
・Screw-down crown
・See-through case back
・Stop second hand function