Grand Seiko Spring Drive U.F.A. Ice Forest SLGB003
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The Spring Drive U.F.A. movement with an astounding annual rate makes its debut in a creation inspired by the beauty of ice forests
The pursuit of high accuracy has been the cornerstone of Grand Seiko’s values since its first watch was created in 1960. In the late 1970s, the development of Spring Drive began with an aim to harmoniously blend the traditional energy of a mainspring with state-of-the-art electronic watchmaking advancements. In 2004, Grand Seiko introduced the Spring Drive Caliber 9R65 with a monthly rate of ±15 seconds.
Today, this legacy of accuracy in watchmaking reaches new heights with the announcement of the Spring Drive Caliber 9RB2, which receives the new U.F.A. designation, standing for “Ultra Fine Accuracy.” The groundbreaking movement boasts a level of precision defined not by accuracy in seconds per day, week, or month, but by its accuracy over one year. The automatic U.F.A. movement has an astounding annual rate of ±20 seconds, making it the most accurate wristwatch movement powered by a mainspring today.*
*As of April 2025, based on Grand Seiko’s research.
In 2025, the Caliber 9RB2 makes its debut in the Evolution 9 Collection. To the east of the Shinshu Watch Studio lie the Kirigamine Highlands, where frost-covered trees can be observed during harsh winter months. The intricately textured dial captures the beauty of these ice forests thanks to finishing techniques that create pale blue tones that are subtle yet striking in their presence.
It features a newly developed three-step micro-adjustment clasp that operates without a tool, allowing precise adjustments in 2mm increments for enhanced comfort.
- SKU: SLGB003
- Brand: Grand Seiko
- Collection: Evolution 9
- Case: High-intensity titanium
- Case Size: Diameter 37.0mm Lug-to-lug 44.3mm Thickness 11.4mm
- Dial: Silver blue textured
- Crystal: Box sapphire crystal with anti-reflective coating on inner surface
- Case-Back: See-through & Screw case back
- Crown: Screw-down
- Water Resistance: 10 bar
- Movement: 9RB2
- Movement Type: Automatic Spring Drive with manual winding
- Power Reserve: 72 hours
- Accuracy: ±20 seconds per year (±3 seconds per month)
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Strap Material: High-intensity titanium
- Buckle: Three-fold clasp with push button release and micro-adjustment feature
- Warranty: 5 year manufacturer international guarantee