Reference 16520 holds a distinguished place among Rolex Daytonas, produced between 1988 and 2000 as the model that brought automatic movement technology to the Cosmograph line. At its heart beats the Calibre 4030, a Zenith El Primero-based movement modified by Rolex to their own precision standards, delivering the chronograph functions — hours, minutes, and seconds — alongside reliable timekeeping.
The 40mm round stainless steel case is fitted with a fixed tachymeter bezel and sealed by a screw-down crown, forming the classic Oyster construction. The black analog dial features luminescent index hour markers and luminescent hands for clear legibility, and is protected by a scratch-resistant sapphire crystal. A bracelet with a fold clasp completes the stainless steel configuration.
Dating to 1999, this Swiss Made example is accompanied by its original box and original papers — a meaningful pairing for collectors drawn to one of the most storied references in the Daytona lineage.
