Rolex Lady-Datejust 28 Yellow Gold — 44 Diamond Bezel Linden Green Strip Diamond Index | Ref. 279138RBR

Linden green — the fresh, slightly yellow-biased green of the European linden tree in early spring — brings an unusual chromatic energy to the Lady-Datejust 28 dial that distinguishes this President bracelet variant of reference 279138RBR from the broader gem-set range. Rolex introduced greens into the Datejust dial palette in earnest during the early 2020s, responding to a broader cultural re-evaluation of the colour as a horological statement rather than a deviation from convention. On this 28 mm dial, the ground is divided into striped bands — alternating values of the same linden hue — that animate the surface under movement, while diamond hour markers punctuate each stripe with studied precision.

The 44-diamond bezel in yellow gold provides the same grain-set brilliance as others in the 279138RBR family, but the green dial gives this particular reference a freshness and chromatic independence that makes it among the more memorable configurations in current production. The President bracelet — the three-link construction reserved exclusively for the Day-Date and precious-metal Lady-Datejust — elevates this reference above the bracelet options available in Oystersteel, its semi-circular solid links tracing the wrist with the compliance and weight of jewellery.

The movement is Calibre 2236 with its Syloxi silicon hairspring, a component that required Rolex to develop bespoke microfabrication infrastructure and represents one of the more significant material advances in the marque's recent technical history. Silicon's combination of zero magnetism, near-zero thermal coefficient of expansion, and the ability to be formed into complex geometries without machining tolerances makes the Syloxi hairspring an inherently superior oscillator to traditional alloys — a fact that has measurable consequences for the -2/+2 seconds-per-day Superlative Chronometer standard to which every cased Rolex movement is held.