The contemporary Cosmograph Rolex Daytona replica chronograph is characterized by a masculine 40mm case, a scratch-resistant sapphire crystal, 904L stainless steel (known as Oystersteel), and an in-house Rolex Caliber 4130 Perpetual movement. The case is most often fitted with a flat three-piece link Oyster bracelet secured by a folding Oysterlock clasp, which gives the 6-digit Daytona an incredibly reliable and comfortable hold on the wrist. The ref. 116520 was the first Daytona to run on a movement designed and produced completely in-house, making it an intriguing and important piece of Rolex history. Stainless steel Rolex Daytona references, such as this one rank among the most desirable and difficult to find watches replica in the world, with demand exponentially exceeding the relatively fixed supply of these remarkable and highly coveted Rolex watches.