The Rolex Cosmograph Daytona 116509 is a classic luxury watch that is known for its timeless design, durability, and accuracy. It is a popular choice among professionals and watch collectors alike. The Cosmograph Daytona 116509 features a 40mm stainless steel case with a white gold bezel, a blue dial with chronograph and tachymeter functions, and a date window at 3 o'clock. It is powered by an automatic movement and is water-resistant to 100 meters.