When discussing the key differences between a 5-digit and a 6-digit reference Daytona, collectors often highlight the groundbreaking introduction of Rolex's first in-house self-winding chronograph movement, the cal. 4130, as well as the repositioning of the seconds register to the 6 o’clock mark. This development marks a significant milestone in the brand’s history. However, a discerning eye will also notice the modernized case design incorporated into the new reference.

The present Rolex Cosmograph Daytona ref. 116528, dating from circa 1999 and bearing an “A” serial number, is particularly special and unusual. It belongs to one of the earliest batches of this new reference. Instead of featuring the updated case with polished lugs, this watch is fitted with an older case that has brushed lugs, making it a rare example where a new movement is paired with a previously unused case from the factory. The significance can be highlighted by the very early movement number 0001’855, which signifies that this current watch can be the 1855th cal. 4130 the manufacture has ever produced. Another interesting aspect of the current watch is the “inverted 6” on the hour counter, reminiscent of the earlier productions of the 5-digit Daytona. This feature is not seen in the other ref. 116528 black dials.

With its hefty and luxurious wrist presence, the watch combines iconic aesthetics with robust construction. This particular example is preserved in excellent overall condition and comes with its original guarantee, making it a noteworthy addition for any collector.