Surgical stainless steel case Sapphire Crystal Case diameter: ΓΈ 41mm Case depth: 12 mm Screw-down crown Luminescent on hands and dial (Superluminova) Turning Bezel 120 step (unidirectional) Ronda Movement Swiss part Chronograph 12H Date display Alarm 12h Surgical Stainless Steel Band Water-resistant: 10ATM (300 feet).