Grand Seiko Sport Collection Spring Drive-SBGE257

Exterior

• Case Material: Stainless steel with ceramic bezel

• Glass Material: Dual-curved sapphire

• Glass Coating: Anti-reflective coating on inner surface

• Case size: Diameter 40.5mm × Thickness 14.7mm

• Clasp type: Three-fold clasp with push button release

Movement

• Caliber No: 9R66

• Movement Type: Spring Drive

• Power reserve: Approx. 72 hours

• Accuracy: ±1 second per day / ±15 seconds per month