IWC Blue Automatic Watch # IW503401 (Men Watch). Band Color : Black. Dial Color : Blue. Display Type : Analog. Item Shape : Round Shape. Band Material : Alligator Leather. Case Size Diameter : 44.2 millimetres. Case Material : 18K White Gold. Clasp Type : Tang. Bezel Material : Fixed. Bezel Function : Fixed. Crystal : Scratch Resistant Sapphire. Water Resistant Depth : 30 meters / 100 feet meters. Movement Type : Automatic. Calendar Type : Perpetual. Model Number:IW503401 IW50340 IW5034 IW503.