PADI Special Edition Automatic Diver Manual and automatic winding capabilities 21,600 vibrations per hour Power reserve: approximately 41 hours 24 jewels One-way rotating elapsed timing bezel LumiBrite hands and markers Day/Date calendar Screwdown crown and caseback Case diameter: 45.0mm Stainless steel case and bracelet Water Resistance: Diver's Watch to 200 meters (660 feet). Follows ISO standards and is suitable for scuba diving. Caliber 4R36 Packaging: supplied in standard Seiko packaging. This applies to all models, including Special and Limited Editions.