Produced circa 1989, the present example bearing an L serial is one of the rare and coveted early Zenith Daytona models. The first half of the “L” series features a 4-Liner dial with a MK I bezel insert calibrated for 200 units per hour. This is followed by a very short run of MK II bezels, like the present example, where the bezel was modified to include scales for 400, 250 and 225 indications, with the “units per hour” relocated to the 1 o’clock position. Enhancing the appeal of this incredibly well-preserved example is the inverted 6 on the 12-hour register, making it one of the most desirable combinations from the series.

The present Rolex Cosmograph Daytona ref. 16520, from circa 1989, features a “L506’701” case number and a correct “18’981” movement number, along with a white dial and MK II bezel. It is offered with its full set of accessories and is preserved in attractive overall condition, showcasing a clean and sharp case. For enthusiasts and collectors of rare and desirable Daytonas, this piece not only completes a missing puzzle in a collection but is also the very example published and archived in the renowned Daytona Perpetual book by Pucci Papaleo.