Evolution 9
Spring Drive U.F.A. Self-winding
SLGB013
Evolution 9
Spring Drive U.F.A. Self-winding
SLGB013
A dial inspired by Lake Suwa
The dial’s distinctive texture is inspired by the surface of Lake Suwa, located southeast of the Shinshu Watch Studio, where the watch is crafted. It depicts gentle ripples stirred by passing winds across the lake, capturing the shimmering glow of the early morning sun reflected on the water, and is rendered through a fine pattern enhanced by a radial finish. Combined with the smooth, gliding motion of the Spring Drive seconds hand, the design evokes the subtle passage of time felt in the stillness of the lakeside.
Caliber 9RB2
The pursuit of high accuracy has always been the cornerstone of Grand Seiko’s values. Receiving the new U.F.A. designation, which stands for “Ultra Fine Accuracy,” Caliber 9RB2 boasts a level of precision defined not by accuracy in seconds per day, week, or month, but by accuracy over one year. The movement has an exceptional annual rate of ±20 seconds, or approximately ±3 seconds per month.
Ever-Brilliant Steel with superior corrosion resistance
Known as Ever-Brilliant Steel due to its brilliant white hue, this special alloy is more resistant to corrosion than the stainless steels used in even the most prestigious watches today. It has a PREN (Pitting Resistance Equivalent Number) of over 40. PREN is a widely accepted standard used to measure corrosion resistance.
A dial inspired by Lake Suwa
The dial’s distinctive texture is inspired by the surface of Lake Suwa, located southeast of the Shinshu Watch Studio, where the watch is crafted. It depicts gentle ripples stirred by passing winds across the lake, capturing the shimmering glow of the early morning sun reflected on the water, and is rendered through a fine pattern enhanced by a radial finish. Combined with the smooth, gliding motion of the Spring Drive seconds hand, the design evokes the subtle passage of time felt in the stillness of the lakeside.
Caliber 9RB2
The pursuit of high accuracy has always been the cornerstone of Grand Seiko’s values. Receiving the new U.F.A. designation, which stands for “Ultra Fine Accuracy,” Caliber 9RB2 boasts a level of precision defined not by accuracy in seconds per day, week, or month, but by accuracy over one year. The movement has an exceptional annual rate of ±20 seconds, or approximately ±3 seconds per month.
Ever-Brilliant Steel with superior corrosion resistance
Known as Ever-Brilliant Steel due to its brilliant white hue, this special alloy is more resistant to corrosion than the stainless steels used in even the most prestigious watches today. It has a PREN (Pitting Resistance Equivalent Number) of over 40. PREN is a widely accepted standard used to measure corrosion resistance.




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A Spring Drive U.F.A. watch inspired by the shimmering water of Lake Suwa.
With its textured pattern, the blue dial expresses the surface of Lake Suwa. This tranquil body of water is located in an area near the place where Spring Drive watches are crafted, the Shinshu Watch Studio, which is housed in a Seiko facility in the city of Shiojiri. The watch is equipped with the Spring Drive U.F.A. Caliber 9RB2, which delivers an extraordinary annual accuracy of ±20 seconds. It also features a power reserve of approximately 72 hours (about three days) when fully wound. Both the case and bracelet are made of Ever-Brilliant Steel, which shines whiter than conventional stainless steel while offering exceptional corrosion resistance.
Exterior
Functions
- Screw-down crown
- 34 jewels
- Power reserve indicator
Movement
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