Evolution 9

Specifications

About this reference

This Spring Drive creation’s impressive case embodies the Evolution 9 Style, a refinement of Grand Seiko’s unique design language, known as the Grand Seiko Style. SLGA009 captures the quiet mood of white birch forests near the Shinshu Watch Studio, home of Grand Seiko Spring Drive watchmaking. The timepiece is powered by the Spring Drive Caliber 9RA2, which features an innovative high-precision mechanism that compensates for variations in the oscillator’s performance by measuring the temperature 540 times per hour, and offers a power reserve of approximately 120 hours (about five days) when fully wound. Exterior: Exterior: 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 40.0mm Lug-to-lug 47.9mm Thickness 11.8mm; Band width: 22mm; Clasp type: Folding clasp with push button release; The perimeter of Band: 196mm. 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: 176 g; Other details / Features: Screw-down crown Power reserve indicator.