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: Bright titanium Case back: bright titanium and sapphire glass
Back cover: Screw see-through back cover
Glass material: dual curve sapphire
Coating: Inner non-reflective coating
Case size: Width 43.5mm Length 51.2mm Thickness 16.1mm
Bandwidth: 21mm
Clasp: One-push three-fold method
Arm circumference length (longest): 193mm
Movement
Movement: 9R96
Driving method: Spring drive automatic winding (with manual winding)
Drive period: About 72 hours (about 3 days) at maximum winding
Accuracy: Average monthly difference ±10 seconds (equivalent to daily difference ±0.5 seconds)
Functions
Waterproofing: Reinforced waterproof for everyday life (10 bar)
Antimagnetic: can be
Weight: 126g
Other: ・50 koku ・24-hour hand (dual time display function)
・Stopwatch function (30 minutes total, 12 hours total)
・Power reserve display function ・Calendar-linked time difference correction function ・Special precision adjustment model ・Back cover "LIMITED EDITION" notation
