Rolex Datejust Yellow Rolesor — 24-Diamond Bezel, Champagne Concentric Arabic Dial | Ref. 178343

Reference 178343 is the Datejust 31 in Yellow Rolesor, combining Oystersteel case architecture with 18-carat yellow gold bezel, crown, and Jubilee bracelet centre links. The bezel mounts 24 brilliant-cut diamonds in a channel arrangement that captures and refracts light across the full periphery of the case, while the champagne-toned dial employs a concentric circle motif — concentrically engine-turned guilloché — as its surface texture, providing depth and visual dimensionality beneath the applied Arabic numerals at 3, 6, 9, and 12. The Jubilee bracelet, with its characteristically dressy five-piece link construction, completes an ensemble calibrated toward formal and semi-formal wear contexts.

Calibre 2236 sits within the 178343, a movement Rolex introduced specifically for the mid-size Datejust and distinguished by its Syloxi silicon hairspring. The Syloxi component's principal advantage over conventional Nivarox-type alloys is its immunity to ferromagnetic field distortion — an increasingly relevant specification as everyday objects generate ambient magnetic interference. A 55-hour power reserve, bidirectional Perpetual rotor, and Paraflex shock absorbers round out the technical profile, and Superlative Chronometer certification attests to post-casing accuracy within ±2 seconds per day.

The 178343 shares its case diameter and movement with the 178344 (white Rolesor equivalent), differentiating primarily through the yellow gold accent elements and the champagne dial colourway. Production of the 178343 has since concluded in favour of the updated 278343RBR generation, lending this reference a degree of transitional collectibility for Datejust 31 enthusiasts seeking the classic proportions of the predecessor case architecture.