Evolution 9 Collection The Tentagraph SLGC007
A mechanical chronograph imbued with the majestic presence of Mount Iwate in winter
SLGC007
Evolution 9 Collection
May. 2025 Release
Features
This mechanical chronograph was created in the Evolution 9 Style, a unique design method that combines the spirit of Grand Seiko and the aesthetic beauty of Japan to reach new heights. The dial captures Mount Iwate, topped with fresh snow, a merger of the harsh winter’s crisp blue sky and the subtle blue tint of the newly fallen snow. The deep snowfall is represented by the snow-blue dial color and an embossed pattern inspired by the mountain’s ridgelines.
This model features the Mechanical Hi-Beat Chronograph Caliber 9SC5 oscillating at a rate of 10 beats per second, which operates continuously for approximately 72 hours (about 3 days) when fully wound.
Specifications
Exterior
| 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 |
| The perimeter of Band: | 195mm |
Movement
| Caliber no.: | 9SC5 Instructions |
|---|---|
| Movement Type: | Automatic with manual winding |
| Mean daily rate: |
+5 to -3 seconds per day
|
| Normal usage accuracy: | +8 to -1 seconds per day |
Functions
| Water resistance: | 10 bar |
|---|---|
| Magnetic resistance: | 4,800 A/m |
| Weight: | 154 g |
| Other details / Features: |
|
A two-layer dial expressing the contrast between rocky ridges and freshly fallen snow.
Nature’s beauty and the ever-changing seasons provide boundless inspiration for Grand Seiko. Mount Iwate, visible from the Grand Seiko Studio Shizukuishi, where the brand’s mechanical watches are crafted, presents breathtaking expressions throughout the year. The dial is inspired by Mount Iwate in the depth of winter, with the new snow depicted in snow-blue, while the mountain’s surface peeks through in the form of black sub-dials.
High legibility, a hallmark of the Evolution 9 Style
One signature of the Evolution 9 Style is its dial with redesigned indexes and hands. Created to achieve maximum legibility, their size and shape allow the wearer to read the time with just a glance. Everything about the Tentagraph’s chronograph and time-of-day displays has been thoroughly considered, from the placement of the hands relative to the indexes to the distance between the dial and the hands. By placing the date between four and five o’clock, an index can remain at each of the traditional hour positions while allowing for maximum readability for the time of day and the chronograph sub-dials.
