GMT 20th Anniversary
Case Material : Stainless steel, Caseback:Stainless steel and sapphire crystal Glass Material : Dual-curved sapphire crystal Glass Coating : Anti-reflective coating on inner surface LumiBrite : LumiBrite on hands, index(es) and bezel Case size : Diameter 44mm Lug-to-lug 50.8mm Thickness 14.9mm Clasp type : Three-fold clasp with push button release
Caliber no. : 9R16 Movement Type : Spring Drive Power reserve : Approx. 72 hours(3 days) Accuracy : ±10 seconds per month (±0.5 second per day)
Water resistance : 20 bar Magnetic resistance : 4,800 A/m Weight : 186.0 g Other details / Features :
- ・24-hour hand (dual time display function)
- ・30 jewels
- ・Calendar-linked time difference adjustment function
- ・LIMITED EDITION on the case back
- ・Power reserve indicator
- ・Rotating bezel
- ・Screw case back
- ・Screw-down crown
- ・See-through case back
- ・Serial number engraved on the case back
- ・Stop seconds hand function
Grand Seiko's first GMT watch was created in 2002 and this watch celebrates its 20th anniversary. In performance and design, it has special qualities that recognize the significance of this landmark in Grand Seiko’s history.
It is powered by a specially adjusted movement, Caliber 9R16, 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 9R16 is specially adjusted Caliber 9R66, to deliver an even higher level of precision.
Caliber 9R66 is ±15 seconds per month (equivalent to ±1 second per day), whereas Caliber 9R16 is ±10 seconds per month (equivalent to ±0.5 second per day).