劳力士，非常罕有，不锈钢自动上弦计时链带腕表，配跌字表盘，DAYTONA，型号16520第一期表盘，R流水号，约1989年制，附原厂证书、盒子及外包装

This remarkable timepiece is an example of the very first production of automatic Daytonas. These rare pieces can arguably be considered as game-changers in the market of the sports watch, as had the first manually wound Daytonas also been considered 20 years ago.

With an oversized 39 mm. case, destined to become 40 mm. one decade later, the new Daytonas were precursors to the "large watch" fashion trend that would hit the market in a few years time. Furthermore, the present watch is adorned by the attractive black dial, with the correct "floating" Cosmograph designation: that is, the gap between the fourth and fifth line is wider than the gaps between the other lines, as if the word Cosmograph was floating away from the rest.