Rolex Datejust Platinum — 42 Diamond Bezel Ice Blue Roman Dial | Ref. 179136

Reference 179136 is among the most formally prestigious configurations in the 26mm Datejust category, combining a solid platinum case with a 42-diamond bezel and the ice blue dial that Rolex traditionally reserves for platinum pieces — a dial color that cannot be ordered with steel or gold cases and therefore functions as an immediate visual signal of the metal used beneath. At 26mm this is the Lady-Datejust in its classic proportional format, and platinum elevates it to a level of material prestige that surpasses all gold configurations in the line.

Rolex's platinum references in the 179xxx series use the calibre appropriate to the 26mm case size, a self-winding movement delivering the precision and reliability that defines Rolex's service proposition. The ice blue dial with Roman numerals has a quality unique to platinum Datejust pieces: it is produced with a particular luminosity and depth that differs visibly from the silver-toned dials found on steel or white gold examples of nominally similar appearance. The 42-diamond bezel at this scale represents a high stone-to-case-surface ratio, wrapping the relatively small case perimeter with closely spaced brilliant-cut stones that maximize brilliance within the available circumference.

From a value and collecting perspective, platinum Datejust references are among the rarest and most material-intensive pieces in Rolex's regular catalog. Platinum's density — notably heavier than gold by volume — and its refining complexity both contribute to pricing well above gold equivalents. The ice blue dial's exclusivity to platinum serves as authentication confirmation and a genuine rarity marker in the secondary market. Buyers should assess stone condition with care given the age of 179xxx series references, and should prioritize pieces retaining the original bracelet and clasp, as platinum Oyster and Jubilee bracelets are expensive to replace or restore.