Serial No. W513697
Purchased new by Carl Haas.
After 25 years of manual winding Daytona, the introduction of the automatic reference 16520 was the most important evolution in the history of the celebrated model.
The watch was completely redesigned and was fitted with the new calibre 4030 based on the Zenith El Primero. Even if the 16520 was produced for only a dozen years, the model saw several developments, mainly consisting in the layout of the dial. In fact, five different changes have been identified.