Seiko 5 SportsManual and automatic winding capabilities 21,600 vibrations per hour Power reserve: approximately 41 hours 24 jewels Black dial and unidirectional rotating bezelDay/date calendar Black hands and markersCase diameter: 42.5mm Stainless steel case with black ion finishBlack nylon strapWater-resistant to 10 bar, 100 meters (300 feet) Caliber 4R36