Grand Seiko Evolution 9 Collection Spring Drive 40 MM Titanium Watch SLGA025G

Nagano Prefecture, where Spring Drive watches are manufactured, is home to a number of mountains rising over 3,000 meters. The countless rivers that flow from these mountains have, over many years, created a lush, natural environment. The Atera River carves out a deep ravine called the Atera Valley, known for its breathtaking beauty. Using the clear, emerald-green waters of the Atera River as a motif, the dial conjures the image of a stream so clear that one can see the bottom, as well as the rich, natural harmony of summertime. At the heart of this watch is the Spring Drive 5 Days Caliber 9RA2. This movement provides up to 120 hours (5 days) of power when fully wound, as well as an average accuracy of ±10 seconds per month, an astounding achievement for a watch powered by a mainspring.

Exterior

Exterior:               High-intensity titanium

Case back:       See-through & Screw case back

Glass Material:               Dual-curved sapphire crystal

Glass Coating:                Anti-reflective coating on inner surface

Case size:          Diameter 40.0mm Lug-to-lug 47.9mm Thickness 11.8mm

Band width:     22mm

Clasp type:       Three-fold clasp with push button release

The perimeter of Band:              195mm

Movement

Caliber no.:      9RA2 Instructions

Movement Type:            Spring Drive

Power reserve:                Approx. 120 hours (5 days)

Accuracy:          ±10 seconds per month (±0.5 second per day)

Functions

Water resistance:         10 bar

Magnetic resistance: 4,800 A/m

Weight:                 112 g

Other details / Features:         

Screw-down crown

Allergy-safe metal

Power reserve indicator