Grand Seiko Evolution 9 Collection Spring Drive U.F.A. 'Atera Valley' SLGB011

Ships September 2026

Features:
Hours, Minutes, Seconds, Date & Power Reserve display
Blue-green textured dial inspired by the crystal-clear waters of the Atera Valley
Spring Drive U.F.A. movement with ultra-high annual accuracy
Exceptional ±20 seconds per year precision
72-hour power reserve
Power reserve indicator on the movement side
Ever-Brilliant Steel case and bracelet with superior corrosion resistance
Three-fold clasp with micro-adjustment system

Specifications:
Movement: Spring Drive Automatic
Caliber: 9RB2
Power Reserve: Approximately 72 Hours (3 Days)
Accuracy: ±20 Seconds per Year (Average)
Jewels: 34
Water Resistance: 10 BAR / 100 m
Magnetic Resistance: 4,800 A/m

Case:
Material: Ever-Brilliant Steel
Diameter: 40.0 mm
Thickness: 11.7 mm
Lug-to-Lug: 47.9 mm
Lug Width: 22 mm
Crown: Screw-Down Crown
Crystal: Box-Shaped Sapphire Crystal
Case Back: Ever-Brilliant Steel with Sapphire Crystal

Dial:
Color: Blue-Green
Finish: Textured Atera Valley Pattern with Gradient Finish
Markers: Polished Index Markers
Hands: Polished Luminescent Hands
Complications: Hours, Minutes, Seconds, Date, Power Reserve Indicator (Movement Side)

Movement:
Type: Spring Drive Automatic
Caliber: 9RB2
Description: Grand Seiko Spring Drive U.F.A. movement combining automatic winding with exceptional precision of ±20 seconds per year, featuring 34 jewels and a 72-hour power reserve for outstanding long-term accuracy and performance.

Bracelet:
Material: Ever-Brilliant Steel
Clasp: Three-Fold Clasp with Micro-Adjustment System