A New Era of Precision: Grand Seiko Unveils the SLGB003 with Spring Drive U.F.A.
Grand Seiko presents a new milestone in the evolution of Spring Drive: the Spring Drive U.F.A. (Ultra Fine Accuracy). Debuting in the SLGB003, this next-generation movement achieves an extraordinary ±20 seconds per year accuracy—representing the highest precision ever reached by Grand Seiko.
The Pursuit of Ultimate Accuracy
For over two decades, Spring Drive has embodied Grand Seiko’s pursuit of perfectly smooth timekeeping—its signature seconds hand gliding silently across the dial. The new Caliber 9RA5-UFA elevates this harmony of mechanical craftsmanship and electronic control to unprecedented levels.
Through an enhanced integrated circuit, optimized quartz oscillator, and advanced temperature compensation system, Grand Seiko engineers have reduced time deviation to just ±20 seconds per year—ten times more precise than traditional Spring Drive movements.
Inspired by the Shinshu Winter Sky
The frosted blue dial of the SLGB003 captures the soft light and stillness of Shinshu’s winter mornings, where each Grand Seiko Spring Drive is born. Subtle vertical hairline textures evoke snow-covered slopes under the clear sky. The tempered blue seconds hand moves effortlessly across the surface, a serene expression of time’s natural flow.
Encased in high-intensity titanium, the SLGB003 is both robust and lightweight, finished with Grand Seiko’s renowned Zaratsu polishing to achieve distortion-free mirror surfaces.
Mastery in Motion: From Movement to Finish
The Caliber 9RA5-UFA retains a 120-hour (5-day) power reserve while introducing structural refinements that improve durability and temperature stability. Its slim profile and enhanced shock resistance embody Grand Seiko’s dedication to technical evolution without compromise.
Equally refined, the case back reveals the finishing and architecture of the movement, while the sculpted titanium bracelet and clasp echo the same precision—sculpted, balanced, and hand-finished to perfection. Together, they form a complete expression of Grand Seiko’s enduring harmony between engineering and artistry.Learn more about the Spring Drive U.F.A. and the Evolution 9 SLGB003 on Grand Seiko’s official site →.
You may contact us → to register your interest and learn more through our boutiques at Grand Seiko Mono Salon BGC, Lucerne Shangri-La Plaza, Le Temps SM Mall of Asia, and Le Temps Trinoma.
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Technical Specifications
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Model: Grand Seiko SLGB003 (Evolution 9 Collection)
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Caliber: 9RA5-UFA (Spring Drive U.F.A.), ±20 seconds per year accuracy
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Power Reserve: 120 hours (5 days)
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Case: High-intensity titanium, 41 mm diameter × 13.1 mm thickness
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Crystal: Dual-curved sapphire with anti-reflective coating
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Dial: Frosted blue with tempered blue seconds hand
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Water Resistance: 10 bar
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Magnetic Resistance: 4,800 A/m
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Bracelet: High-intensity titanium with three-fold clasp and push-button release
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