Grand Seiko Evolution 9 Collection Spring Drive U.F.A. Ushio 300 Diver

June 2026 release

Features:
Unidirectional rotating bezel
Screw-down crown
Power reserve indicator
Screw case back
Allergy-safe metal

Specifications:
Movement: Seiko Calibre 9RB1
Movement Type: Spring Drive
Jewels: 33
Power Reserve: Approx. 72 hours (3 days)
Accuracy: ±20 seconds per year (±3 seconds per month)
Water Resistance: 300m / 1000ft diver’s
Magnetic Resistance: 4,800 A/m

Case:
Material: High-Intensity Titanium
Diameter: 40.8 mm
Thickness: 12.9 mm
Lug-to-lug: 48.5 mm
Crystal: Sapphire crystal with anti-reflective coating (inner surface)

Dial:
Hands & Markers: LumiBrite on hands, indexes, and bezel

Strap:
Lug width: 21 mm
Clasp: Locking extension clasp with micro-adjustment