Grand Seiko Heritage Collection Stainless Steel Quartz 28.9mm STGF359
Exterior: Stainless steel Case back: Screw case back Glass Material: Dual-curved sapphire crystal Glass Coating: Anti-reflective coating on inner surface Case size: Diameter 28.9mm Lug-to-lug 35.4mm Thickness 8.7mm Band width: 14mm Clasp type: Three-fold clasp with push button release The perimeter of Band: 185mm Caliber no.: 4J52 Instructions Movement Type: Quartz Accuracy: ±10 seconds per year Water resistance: 10 bar Magnetic resistance: 4,800 A/m Weight: 71 g