Citizen Watch Model Chronograph WR100 Model: Citizen Chronograph Movement: Caliber 0520 Quartz Movement Type: Battery (Quartz) Water Resistance: WR100 = Up to 100 meters (10 bar) Case Material: Stainless Steel Strap: Original Stainless Steel Glass: Mineral Crystal, relatively scratch-resistant Case Diameter: Approximately 42 mm Watch Thickness: About 11–12 mm