The Rolex Oyster Perpetual Cosmograph Daytona 116523 features a 40mm stainless steel case with an 18k yellow gold bezel surrounding a black Tahitian mother-of-pearl dial on a stainless steel and 18k yellow gold Oyster bracelet with folding buckle. Functions of this Rolex Daytona chronograph include Rolex manufacture caliber 4130 automatic with 72-hour power reserve, vertical clutch and column wheel, COSC Swiss chronometer certification, 100-meter water resistance, hours, minutes, small-seconds and chronograph. This Rolex watch also measures 12.3mm in thickness and 46.5mm from lug-to-lug.