Rolex Datejust 31 Yellow Rolesor — Silver Diamond Dial | Ref. 178243

Reference 178243 belongs to the previous generation of the Datejust 31 — produced under the 178xxx reference nomenclature before the 2016 introduction of the 279xxx series — and represents the Yellow Rolesor configuration in its established form. The case in Oystersteel with an 18 ct yellow gold domed bezel and matching crown demonstrates the Rolesor philosophy: a pairing of materials that acknowledges the appeal of precious metal accents without committing to a fully gold construction. At 31 mm, the case sits between the Lady-Datejust 26 (now discontinued) and the 36 mm standard.

The silver dial set with individual diamond hour markers places this reference within the gemstone-dial tier of the 178xxx Datejust family. Each hour marker features a single brilliant-cut diamond in an 18 ct yellow gold bezel setting, hand-set to uniform height and consistent orientation. The applied yellow gold baton hands maintain the chromatic palette, while the date at three o'clock — amplified by the Cyclops lens bonded to the sapphire crystal — provides the functional anchor for the composition. The overall dial execution is one of considered luxury without ostentation.

Unlike the current 279xxx generation calibrated with the Calibre 2236, references in the 178xxx series were fitted with the Calibre 2235 — the preceding in-house movement for this case diameter. The 2235 was itself a capable movement by industry standards, though it lacked the Syloxi silicon hairspring of its successor, relying instead on a Glucydur beryllium-copper balance and Nivarox spring. The Oyster bracelet in Yellow Rolesor with Oysterclasp provides secure daily fastening with the familiar three-link architecture.