The Cosmograph Daytona has a fascinating story in the world of modern Swiss watchmaking. Initially, it was powered by a Valjoux movement until it transitioned to the 4030 caliber in 1988. This 4030 caliber was based on the Zénith El Primero movement and became the world's first high-frequency self-winding chronograph movement. Rolex engineers dedicated their efforts to optimizing it, stabilizing the frequency at 4 Hertz, ensuring the movement's robust reliability. In 2000, Rolex introduced the 4130 caliber (upgraded to the 4131 or the special edition 4132 in 2023), carrying forward the legacy of the brand's founder, Hans Wilsdorf.