Rolex Datejust Yellow Gold — Silver Roman Dial | Ref. 279178

The Lady-Datejust 28 in 18 ct yellow gold occupies a well-defined position at the pinnacle of Rolex's ladies' dress-watch range, and reference 279178 with its fluted bezel and President bracelet represents that position in its most classical form. The 28 mm Oyster case in solid yellow gold is polished to a mirror finish on the lugs and bezels, contrasting with the brushed centre links of the five-piece President bracelet — a visual rhythm that has defined the Day-Date and Lady-Datejust President configuration since the 1960s.

Calibre 2236, introduced in 2015 specifically for the Lady-Datejust 28 and Pearlmaster 29, represents a generational advancement in Rolex ladies'-movement engineering. Its 55-hour power reserve — a significant improvement over its predecessor — is achieved through a more efficient barrel geometry, while the Syloxi hairspring, manufactured from silicon in-house, offers superior resistance to magnetic fields, gravity-induced positional error, and temperature variance. The movement earns chronometer certification to ±2 seconds per day and features the Rolex-patented Paraflex shock system.

The silver dial carries Roman numeral hour markers in yellow gold — an indication type with direct historical lineage to pocket-watch horology that lends the 279178 an air of studied formality. The fluted bezel, machined from a single piece of 18 ct yellow gold, adds textural contrast while reinforcing the case's Oyster water-resistance. This reference rewards the collector who places canonical watchmaking vocabulary above contemporary design experimentation.