Seiko Prospex Automatic SRPD23K Divers 200m Samurai 'Save The Ocean Great White Shark Special Edition. Seiko is committed to preserving the marine environment. A portion of the proceeds of the Prospex Save the Ocean collection will be donated to the Fabien Cousteau Ocean Learning Centre, an institution created to make a direct and positive contribution to the health of the oceans. Metallic, shimmering oceanic blue dial has a wave pattern almost carved into it giving it a 3D effect. - Automatic with manual winding capacity - Accuracy 45 to -35 seconds per day - Duration Approx. 41 hours - Exterior Case Material Stainless steel - Crystal Hardlex - LumiBrite Lumibrite on hands and indexes - 200 Meters Water Resistant - 43.8mm Case Size - 13.4mm Case Thickness - Screw Case Back - Screw Down Crown