Seiko 5 Sports CollectionInspired by vintage field/military styleAutomatic with manual winding capability21,600 vibrations per hour Power reserve: approximately 41 hours24 jewelsBlue-gray dialDay/date calendarLuminous hands and markersRed-orange tipped second handScrewdown see-through casebackCase diameter: 39.4mmStainless steel caseBlue-gray nylon strapWater-resistant to 10 bar, 100 meters (330 feet)Caliber 4R36