Rolex Cosmograph Daytona Black Dial 116520 2016 Discontinued [Preowned]Overview The Rolex Cosmograph Daytona 116520, introduced in 2000, marked a major turning point for the brands legendary chronograph. For the first time, Rolex equipped the Daytona with an in house movement, the Calibre 4130, ending the long standing partnership with Zenith. The 116520 retained the iconic 40mm stainless steel case and screw down pushers, offering a sporty yet refined aesthetic that solidified the Daytonas status as one of the most