Rolex Datejust 31 Yellow Rolesor — Silver Diamond Dial with Fluted Bezel | Ref. 278273

Reference 278273 is drawn from the current-generation Datejust 31 family and presents the Yellow Rolesor specification — Oystersteel and 18 ct yellow gold — in combination with the fluted bezel, a Rolex signature element first introduced in the 1950s as a technical tool to secure the bezel by screwing it into the case. Today the 18 ct yellow gold fluted bezel serves a purely aesthetic function, its precisely machined grooves catching light and creating visual rhythm around the dial perimeter. The silver dial set with diamond hour markers delivers clarity and brilliance, the pave-set indices providing confident legibility while reinforcing the jewellery-watch character of the piece.

The 278xxx reference number confirms this as a current-generation Datejust 31 driven by calibre 2236 — the successor to the 2235 and a movement that introduces Rolex's silicon Syloxi hairspring, developed in collaboration with the brand's research division. The Syloxi hairspring is insensitive to magnetic fields and temperature variations, and its geometry is optimised for isochronism across the full arc of oscillation. The 2236 operates at 28,800 vph with a 55-hour power reserve, and its Superlative Chronometer certification ensures performance to -2/+2 seconds per day — standards that place it well above the broader Swiss industry norm.

The fluted bezel Yellow Rolesor Datejust 31 is one of the most classically composed expressions within the lady and mid-size Rolex canon. The silver diamond dial variant offers the most legible and versatile interpretation of the reference — compatible with both professional and formal contexts, and capable of being dressed up or down with equal ease. Current-generation 278xxx examples retain strong demand among collectors who prioritise both movement currency and the enduring elegance of the fluted bezel aesthetic.