In 1988, Rolex launched its first automatic chronograph, the "Zenith" Daytona ref. 16520. Powered by Zenith's El Primero movement, this release marked a new era for the Daytona line. Although the movement's origins trace back to Zenith, Rolex made over 200 modifications to elevate it to the brand's standards, resulting in the caliber 4030. The collectibility and appeal of this Daytona generation continue to rise, with increasing attention from collectors.
In 1988, Rolex launched its first automatic chronograph, the "Zenith" Daytona ref. 16520. Powered by Zenith's El Primero movement, this release marked a new era for the Daytona line. Although the movement's origins trace back to Zenith, Rolex made over 200 modifications to elevate it to the brand's standards, resulting in the caliber 4030. The collectibility and appeal of this Daytona generation continue to rise, with increasing attention from collectors.