Features: stainless steel case stainless steel bracelet quartz movement caliber 5174 1/20-second chronograph tachymeter mineral crystal black dial screw lock back screw lock crown date display regular timekeeping accuracy ±20 seconds per month double-lock, 1-press, 3-fold buckle 100 meter water resistant case diameter 50.8mm (including crown) case diameter 45.1mm (excluding crown) case thickness 12.1mm weight 181g