Rolex Datejust 31 Gold — Diamond Bezel Rose Index | Ref. 278285RBR

Reference 278285RBR represents the Datejust 31 at its most opulent — a 31 mm expression in precious metal that balances wearable scale with undeniable presence. Within the contemporary Datejust family, the 278xxx generation marks Rolex's integration of the Calibre 2236 movement into the mid-size case, a significant mechanical upgrade that places this reference squarely in the current production era.

Powering the watch is the in-house Calibre 2236, a movement developed specifically for Rolex's mid-size and Lady models. It features the Syloxi hairspring — a silicon component engineered for superior resistance to magnetic fields and thermal variation — and delivers a 55-hour power reserve. The gold case is paired with a diamond-set bezel, while the rose index dial configuration lends the piece a warm, layered aesthetic where each hour marker functions simultaneously as a gem-set element and a structural design detail. The Jubilee bracelet, traditionally paired with Datejust references, provides a supple drape suited to the 31 mm proportions.

For the collector, 278285RBR occupies a precise niche: full precious metal construction with factory diamond integration, yet in the restrained 31 mm format that appeals to those who find the 36 mm case slightly oversized. Demand remains steady among buyers seeking a complete-metal Datejust with current-generation mechanics, and examples with full box and papers command meaningful premiums in the pre-owned market.