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The Spring Drive Chronograph GMT movement, Caliber 9R86, was first released in 2007. Thanks to the unique one-second-a-day precision of Spring Drive and the fact that the chronograph stops at the exact moment that the button is depressed and not at the nearest ‘tick’, it was, and remains, the most accurate spring-driven chronograph in the world.
This limited edition watch commemorates the 15th anniversary of the first Spring Drive Chronograph and is powered by a specially adjusted movement, Caliber 9R96, which offers an enhanced precision rate of ±10 seconds per month. The Grand Seiko lion emblem is featured in 18K yellow gold on the oscillating weight. The dial has the rugged texture of the snow surface that can be seen in the high mountains that surround the Shinshu Watch Studio in central Japan in late winter and early spring. When the daytime temperatures start to rise and the annual thaw begins, the wind carves a unique pattern as it whips across the melting snow drifts. This ephemeral and beautiful effect is captured on the dial.
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 43.5mm
Lug-to-lug 51.2mm
Thickness 16.1mm
Band width: 21mm
Clasp type: Three-fold clasp with push button release
The perimeter of Band: 193mm
Movement
Caliber no.: 9R96 Instructions
Movement Type: Spring Drive
Power reserve: Approx. 72 hours (3 days)
Accuracy: ±10 seconds per month (±0.5 second per day)
Functions
Water resistance: 10 bar
Magnetic resistance: 4,800 A/m
Other details / Features: