Case Case Size | 38.5mm | Case Back | Exhibition Screw Case Back, Open | Case Material | stainless steel | Bezel | Fixed | Indexes | Indexes | Water Resistance | 30m | | Movement Movement Type | Manual, Spring Drive | Movement | Grand Seiko Caliber 9R31 | Power Reserve | 72 Hours | | General Bracelet/Strap | Crocodile Leather | Buckle | Deployment | Collection | Elegance Collection | Brand | Grand Seiko | Crystal | Sapphire Crystal, Dual-Curved With Anti-Reflective Coating On Inner Surface | Warranty | 5 Years Manufacturer warranty | Features | Dual-Spring Barrel, Power reserve indicator. A manual-winding Spring Drive caliber made in the Shinshu Watch Studio, 9R31 has an innovative dual-spring barrel that contains two mainsprings set in parallel and delivers a power reserve of 72 hours. | |