Rolex Datejust 31 Yellow Gold — Olive Green Diamond Dial, Diamond Bezel | Ref. 278288RBR

Reference 278288RBR positions the Datejust 31 at the intersection of horological craft and jewellery making. The 18 ct yellow gold Oyster case wears a diamond-set bezel that adds brilliance to the warm gold tone, while the olive green dial set with diamond hour markers delivers a colour combination that has become one of the more talked-about introductions in modern Rolex history. Olive green carries associations with vintage military dials yet feels entirely contemporary in this all-gold, diamond-dressed context.

At the heart of the 31 mm case lies Calibre 2236, Rolex's self-winding movement distinguished by its Syloxi silicon hairspring — a component machined in-house using LIGA photolithography — that offers superior resistance to magnetism and temperature extremes compared to traditional metallic alloys. The movement operates at 28,800 vph and stores 55 hours of power reserve. Reference 278288RBR is typically presented on the President bracelet in 18 ct yellow gold, the three-link design historically associated with the Day-Date and the brand's presidential heritage.

Yellow gold Datejust 31 references in precious metal have experienced sustained secondary market appreciation, particularly those featuring fashionable dial colours. The olive green variant is recent enough that mint examples with papers remain comparatively rare on the pre-owned market. Buyers who secure one now are acquiring not just a fine watch but a reference that is likely to be regarded as a watershed Datejust colour introduction in years to come.