From the Essentials CollectionAutomatic with manual winding capability21,600 vibrations per hourPower reserve: approximately 41 hours23 jewelsGreen sunray dialDate calendarScrewdown see-through casebackCase diameter: 41.2mmStainless steel case and braceletTri-fold push button release claspWater resistant to 10 bar, 100 meters (330 feet)Caliber 4R35