Grand Seiko Spring Drive Manual SBGY035

This limited edition commemorates the 20th anniversary of Grand Seiko's original Spring Drive movement, Caliber 9R, which was created in 2004.

The Hotaka mountain range rises majestically in the Shinshu region of central Japan, the birthplace of all Grand Seiko Spring Drive creations. The gradation on the dial reflects the moment when the sun begins to rise. As the steep landscape of the Hotaka mountain range turns a vibrant red, the light casts a radiant glow on the autumn leaves as they emerge from the darkness of dawn. This beautiful scenery is expressed by the dark red color at the dial’s periphery gradually becoming brighter toward the center.

It delivers a power reserve of 72 hours thanks to the manual-winding Caliber 9R31 with an innovative dual-spring barrel that contains two mainsprings set in parallel.

Reference Number - SBGY035

Exterior

Case Material - Stainless steel

Case Back - See-through & Screw Case Back

Glass Material - Dual-curved sapphire crystal

Glass Coating - Anti-reflective coating on inner surface

Case Size - Diameter 38.5mm, Lug-to-Lug 43.7mm, Thickness 10.2mm

Band Width - 19mm

Band Material - Crocodile Leather

Clasp Type - Three-fold clasp with push button release

Movement

Caliber no. - 9R31

Movement Type - Spring Drive Manual Winding

Power Reserve - Approx. 72 hours

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

Functions

Water resistance - Splash Resistant

Magnetic resistance - 4,800 A/m

Other details/ Features - LIMITED EDITION on the case back, serial number engraved on the case back, 30 jewels, power reserve indicator