Reference 16520 is among Rolex's most innovative models ever produced. Housing the iconic Zenith-based caliber 4030 mechanism, the model was fitted with the first automatic chronograph movement in the firm's history. At the time of launch in 1988, it quickly became a cult classic and garnered an immediate waiting list at Rolex retailers. Today, the Zenith Daytona has become an even more collectible watch due to its rarity, good looks and importance within the history of Rolex.

The present example, preserved in excellent condition is part of an elite and incredibly sought after subsection of the Zenith Daytona models featuring charismatic subsidiary registers that have turned "tropical" over time. This "tropical" effect mainly occurs on Cosmograph dials produced during the early to mid-1990s. This example furthermore retains its original guarantee stating that the watch was retailed by Attar Jeddah, which is correct for the guarantee's country code "532" indicating Saudi Arabia. Even the fitted presentation box is correct as it still retains the "16520" sticker on the side.