Description{missing in Material.csv} More Details Origin: Swiss Made Always visible: Constant glow for up to 25 years Function: Time date Movement: Swiss quartz Caliber: RONDA 515 Water resistance: 200 meters / 660 feet / 20 ATM Case diameter: 44 mm Bezel: Unidirectional rotating Case material: CARBONOX™ Case back: 316L Stainless steel screw on Crystal / glass material: Sapphire crystal, anti-reflective coating Crown: Screw-Down Crown Strap / bracelet: Black nitrile rubber Strap / bracelet buckle: Black CARBONOX™ Lug width: 24 mm Case height: 16 mm Weight: 71 g Approximate battery life span: 50 months