Grand Seiko Evolution 9 Collection Spring Drive U.F.A. 'Lake Suwa' 37mm SLGB015

Ships September 2026

Features:
Hours, Minutes, Seconds, Date & Power Reserve display
Blue textured dial
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
37 mm Ever-Brilliant Steel case – the smallest self-winding Spring Drive model
Three-fold clasp with micro-adjustment system

Specifications:
Movement: Spring Drive U.F.A. movement 
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: 37.0 mm
Thickness: 11.4 mm
Lug-to-Lug: 44.3 mm
Lug Width: 20 mm
Crown: Screw-Down Crown
Crystal: Box-Shaped Sapphire Crystal
Case Back: Ever-Brilliant Steel with Sapphire Crystal

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

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