Seiko Presage Classic SPB523 pairs a refined mid-size case with an automatic 6R51 movement and a dual-curved sapphire crystal. It suits everyday wear and dress occasions where classic proportions and reliable mechanical performance matter. Key attributes: Gray | Acciaio | Acciaio | Water resistance: 10 bar | Power reserve: approx. 72 hours | Magnetic resistance: 4,800 A/m | Sapphire crystal | Automatic movement (Caliber 6R51) | Manual winding capability | Deployment clasp with push button release | See-through screw case back | Stop second hand function | Dual-curved sapphire crystal | Curved dial with matching hands and indices | Seven-piece multi-row bracelet | Dimensions & fit: Case diameter: 36.0 mm | Case thickness: 12.5 mm | Lug-to-lug: 41.4 mm | Bracelet length: 195.0 mm | Lug width: 18 mm | Weight: 118.0 g | Composition & care: Stainless steel (super hard coating) | Sapphire crystal