Rolex Datejust Yellow Gold — Silver Diamond Roman VI Index Dial, Fluted Bezel | Ref. 178278

Reference 178278 belongs to the pre-2016 generation of the Datejust 31 — the mid-size configuration that has served as the sweet spot between the 28mm ladies' model and the 36mm standard since its formalisation in the manufacture's catalogue. In 18-carat yellow gold throughout, with a fluted bezel that multiplies the warmth of the precious metal through its twenty-two machined grooves, this example presents one of the collection's most characterful dial configurations: a silver ground set with a mixed Roman numeral and index layout, in which the VI position is marked by a diamond rather than numerals, creating a subtle asymmetry that rewards close examination.

The Calibre 2235 self-winding movement — the predecessor to the current 2236 — delivers the hallmarks of Rolex's mid-size movement architecture: robust automatic winding, instantaneous date display with rapid-setting crown function, and stop-seconds for disciplined time setting. The President bracelet in matching yellow gold, with its distinctive semi-circular three-piece links and concealed Crownclasp, reinforces the day-date-family visual association and positions this Datejust firmly within Rolex's formal watch tradition rather than its sports lineage.

Waterproof to 100 metres thanks to the Twinlock crown system, and protected by scratch-resistant sapphire crystal with Cyclops magnification over the date aperture, the 178278 is a timepiece that earns its place in any serious collection. Its gold and diamond configuration speaks to an earlier era of unambiguous material confidence that collectors of precious Rolex references continue to find deeply persuasive.