Longines HydroConquest Automatic Chronograph Mens Watch # L3.644.4.56.6. Dial color Black. Case Stainless steel. Band Stainless steel bracelet with folding locking clasp and integrated diving extension. Bezel Black aluminum unidirectional rotating. Antireflection sapphire crystal. Date aperture at 3 oclock. Chronograph stopwatch features. Movement Self winding automatic. Water resistant 300 meters. Approximate case diameter 41mm. Approximate case thickness 16mm