To the southeast of the Shinshu Watch Studio, where Spring Drive watches are made, one will find the gently lapping waters of Lake Suwa, a constant inspiration for Grand Seiko. Take, for example, the dial of the Spring Drive SLGA021, which evokes the surface of this very body of water. When one looks upon it, they can’t help but see gentle waves wafting over the wind-swept lake in the pre-dawn stillness. And like a gentle wind on an otherwise tranquil body of water, the dark blue color manifests differently depending on the angle at which light catches it. The watch is powered by the Caliber 9RA2 Spring Drive 5 days movement, assembled by the skilled artisans of the Shinshu Watch Studio and engineered to run approximately 120 hours (5 days) when fully wound. Like flowing water, the seconds hand moves with the quiet, natural pace of time itself thanks to the Spring Drive movement just below the dial’s surface.
Specifications
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
Movement
Caliber no.: 9RA2
Movement Type: Spring Drive
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
