A milestone of Rolex’s chronograph history, the reference 6238, known as the "Pre-Daytona", was produced in a variety of dial combinations, encased in stainless steel, 14k or 18k yellow gold. They were fitted with silver, grey, or black dials, with tachymeter and/or telemeter scales printed directly on the dials differentiating them from their successors, the Cosmograph Daytona.

Terms the Geneva team have debated using to describe this watch include "Time Capsule", "Preservation Class" and "Museum Grade". The astounding condition of this watch sets it apart from its peers. Having previously resided in the John Goldberger collection, it has always sold leaps and bounds above the low estimate every time it has appeared at auction - an affirmation of the quality of the present timepiece.

Featuring full, thick lugs and a wide bezel, its proportions are excellent. In addition, there are two sharp hallmarks punched beneath the lugs that are incredibly crisp. The numbers between the lugs are deep and visible, and they have never seen intervention throughout their lives. It features full luminous dots that display warm patina, matching the hands. Adding even another element of delight, it is accompanied by its blank Guarantee dated 17 December 1964, Chronometer Certification slip, green leather presentation box and outer packaging. Such rare gems hardly ever come on the market, marking an extremely rare opportunity to acquire a watch that is "best in its class" for that category.