勞力士，非常精細，不銹鋼自動上弦鏈帶腕錶，配計時功能及熱帶棕色刻度圈，“宇宙計型迪通拿”，型號16520，約1994年製

Legendary model, the reference 16520, was the first chronograph of the Rolex manufacture to be fitted with an automatic movement derived from a Zenith ébauche. Built with a larger case than its predecessors and a sapphire-crystal glass, the timepiece encountered great success and throughout the years has become an icon amongst Rolex collectors.

Of particular interest, the present chronograph features tropical brown subsidiary registers where the original white chapter rings have reacted to sunlight and other environmental factors and have turned into shades of brown. These dials are so-called "tropical" dials and are sought-after by collectors.