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Grand Seiko Evolution 9 Tentagraph SLGC001G
High-beat precision and three days of power reserve come together in the new Tentagraph, Grand Seiko’s first mechanical chronograph.
The Tentagraph, an automatic high-beat chronograph, is the first watch of its kind from Grand Seiko. Powered by the new Caliber 9SC5, which uses the Caliber 9SA5 as its base, it is emblematic of the next generation of Grand Seiko sports watches, both for its technological innovation and its equally stunning Evolution 9 Style. With a power reserve of 72 hours, the Tentagraph is the longest-running 10-beat chronograph on the market today. And its design has been fully updated for active use and easy reading while in motion.
The Tentagraph’s case and bracelet are made from High-intensity titanium, which is about 30 percent lighter and more scratch resistant than stainless steel, and its bezel is made from scratch-resistant ceramic. The watch’s dial pattern evokes the magnificence of Mt. Iwate, the soaring peak visible from the Grand Seiko Studio Shizukuishi.
Exterior
| Case Back | See-through & Screw case back |
|---|---|
| Glass Material | Box shaped sapphire crystal |
| Glass Coating | Anti-reflective coating on inner surface |
| LumiBrite | Lumibrite on hands and index(es) |
| Case size | Diameter 43.2mm Lug-to-lug 51.5mm Thickness 15.3mm |
| Bandwidth | 23mm |
| Clasp type | Three-fold clasp with push button release |
Movement
| Caliber no. | |
|---|---|
| Movement Type | Automatic with manual winding |
| Power reserve | 72 hours |
| Accuracy | +5 to -3 seconds per day |
Functions
| Water resistance | 10 bar |
|---|---|
| Magnetic resistance | 4,800 A/m |
| Other details / Features |
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