SEIKO King Seiko - Watchmaking 110th Anniversary LTD SPB365J1 Caliber 6R31 automatic and manual winding movement. Power reserve 70 hours. Central seconds hand on copper brown dial, index hour markers. 37mm stainless steel case. Sapphire crystal on top and solid case back. Water resistant to 100M. Stainless steel bracelet. Limited to 1,200 pieces worldwide. Movement Accuracy: -15/+25 seconds per day Calibre: 6R31 Movement Type: Automatic & Manual Winding Power Reserve: 70 Hours Watch Case Case Material: Stainless Steel Case Thickness: 12.1mm Case Diameter: 37.0mm Case Length: 43.6mm Lug Width: 19.0mm Exterior Dial Colour: Copper Brown Clasp: Deployment clasp with push button release Strap/Bracelet: Stainless Steel Other Specifications Water Resistance: 10 bar Crystal Coating: Anti-reflective coating on inner surface Crystal Type: Box shaped sapphire crystal