A limited edition Spring Drive chronograph to celebrate the 15th anniversary of Caliber 9R86
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.

Caliber : 9R96
Accuracy : ±0.5 second per day (±10 seconds per month)
Case Material : High-intensity Titanium
Case Size : Diameter 43.5mm; Lug-to-lug 51.2mm; Thickness 16.1mm
Crystal/Glass Material : Dual-curved Sapphire Crystal
Crystal/Glass Coating : Anti-reflective Coating On Inner Surface
Band Material : High Intensity Titanium
Clasp Type : Three-fold Clasp With Secure Lock, Push Button Release
Movement : SPRING DRIVE
Duration : 72 hours(3 days)
Water Resistance : 10 Bar

Other details / Features :    

• 24-hour hand (dual time display function)
• 50 jewels
• Against an allergic reaction to metal
• Calendar-linked time difference adjustment function
• Chronograph with 30 minutes & 12 hours
• LIMITED EDITION on the case back
• Power reserve display
• Screw case back
• Screw-down crown
• See-through case back
• Serial number engraved on the case back
• Stop second hand function