IWC pilot series lW5127537 men's watch movement: automatic mechanical Swiss machine 2824 case: 316 stainless steel vacuum fine plating three colors available diameter: 41mm thickness: 12mm crown: screw-in bottom: dense bottom independent jump code mirror: Blue light arched sapphire case: 316 stainless steel, strap with double clip Yapeng genuine cowhide buckle: stainless steel buckle Waterproof: 50 meters Function: super luminous, date display! White rose and black are the same price,