Rolex Datejust 31 White Rolesor — Silver Diamond Dial, Diamond Bezel | Ref. 278384RBR

The Datejust 31 in White Rolesor with a diamond bezel and diamond-set silver dial — reference 278384RBR — represents the middle tier of Rolex's Datejust size range, slotting between the 28mm Lady-Datejust and the 36mm standard Datejust. White Rolesor combines an Oystersteel case and bracelet with 18ct white gold crown guards and bezel setting, a configuration that exploits the tonal harmony between the two metals to present a unified platinum-adjacent appearance without the cost premium of an all-precious-metal case. The "RBR" suffix in the reference confirms a bezel set with brilliant-cut diamonds — in this instance, 44 individual stones arranged in Rolex's signature continuous channel.

The Calibre 2236 governs timekeeping in this 31mm reference, a movement introduced by Rolex as a ground-up replacement for the Calibre 2235. The 2236 incorporates the Syloxi hairspring — a Rolex-developed silicon component that renders the oscillator immune to magnetic fields and insensitive to temperature variation — alongside a 55-hour power reserve and a 28,800 vph beat rate. The silver dial in this configuration is set with diamond hour markers, replacing the standard applied indices with individually graded round brilliants that are flush-set to avoid snagging. The Jubilee bracelet, standard for this reference, provides a five-piece link construction in Oystersteel with 18ct white gold centre links.

For buyers, this reference functions as a versatile formal and semi-formal watch capable of reading as jewellery without abandoning everyday legibility. Demand for diamond-dial Datejust 31s in White Rolesor has been consistent rather than volatile, meaning secondary market pricing reflects genuine wearability value rather than speculative premium.