High-beat precision and three days of power reserve come together in the Tentagraph, with a dial inspired by Mt. Iwate.
SLGC001
Evolution 9 Collection
EUR 15 000,00
Features
This model’s case design has evolved with a sporty character based on the Evolution 9 Style, a design language that represents a step forward for the Grand Seiko Style. The watch’s dial captures the serene beauty of a snowy moonlit night over Mt. Iwate, as seen from the Grand Seiko Studio Shizukuishi, the home of Grand Seiko’s mechanical watchmaking. The movement inside is the Caliber 9SC5, Grand Seiko’s first mechanical chronograph “Tentagraph.” Even with its 10-beat frequency, this movement achieves an impressive power reserve of approximately 72 hours (about three days) when fully wound.
Specifications
| Exterior: | High-Intensity Titanium with ceramic bezel |
|---|---|
| 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 |
| Band width: | 23mm |
| Clasp type: | Three-fold clasp with push button release |
| Caliber no.: | 9SC5 Instructions |
|---|---|
| Movement Type: | Automatic with manual winding |
| Power reserve: | Approx. 72 hours(3 days) |
| Mean daily rate: |
+5 to -3 seconds per day
|
| Normal usage accuracy: | +8 to -1 seconds per day |
| Water resistance: | 10 bar |
|---|---|
| Magnetic resistance: | 4,800 A/m |
| Weight: | 154 g |
| Other details / Features: |
|
An Evolution 9 sport design that enhances functionality.
The Evolution 9 Style represents the essence of Grand Seiko’s design philosophy, harmoniously blending Japanese aesthetics with refined craftsmanship. Based on this design language, this model adopts a form that ensures intuitive usability and excellent operability in any situation. The tachymeter bezel is made of highly scratch-resistant ceramic, allowing it to maintain its refined appearance over time.
A dial designed in pursuit of the ideal chronograph
The dial design follows the Evolution 9 Style and adopts a traditional chronograph layout. The distinctive hour and minute hands, along with the indexes with Lumibrite, are positioned with minimal clearance to enhance not only legibility during time measurement but also overall time readability. Mt. Iwate, visible from the Grand Seiko Studio Shizukuishi, serves as a source of inspiration and a spiritual anchor for the craftspeople. The dial combines a delicate pattern inspired by the mountain’s surface with a transparent blue tone, expressing the starry sky that spreads above its summit. This design reflects a vision of reaching the pinnacle of the ideal chronograph.
Features of the Tentagraph Caliber 9SC5
The Tentagraph’s name describes key features of the Caliber 9SC5 movement inside: Ten beats per second, three days of power reserve, automatic winding, and the fact that it is a chronograph.
Fully wound, the watch runs for 72 hours when the chronograph is in operation.










