Rolex Day-Date 40 Gold — Olive Green Bevelled Roman Dial | Ref. 228345RBR

The Day-Date 40 in reference 228345RBR is a statement of horological authority — a 40 mm gold dress watch whose olive green dial with bevelled Roman numeral hour markers places it firmly among the most distinguished expressions of this flagship collection. Introduced as the first watch waterproof and self-winding enough to display both the date and the full day of the week, the Day-Date has remained the definitive prestige watch since 1956, and this contemporary iteration honours that legacy without compromise.

Powering the watch is Calibre 3255, Rolex's most advanced movement to date, featuring the patented Chronergy escapement — a redesigned lever and escape wheel that improves energy efficiency by 15% over previous generations. The Parachrom hairspring, crafted from a paramagnetic niobium-zirconium alloy, resists magnetic fields and temperature variation far more effectively than conventional materials. A 70-hour power reserve and five patents embedded within the movement underscore the depth of Rolex's engineering investment in this reference.

The RBR designation signals a factory-set diamond bezel, elevating this Day-Date into the realm of high jewellery as much as haute horlogerie. The olive green dial — a colour that has experienced a dramatic resurgence among collectors in the past decade — pairs with gold Roman numerals in a combination that is both visually arresting and contextually appropriate for the world's most recognisable presidential watch. Acquiring reference 228345RBR is acquiring a watch that transcends trends, carrying within it both mechanical excellence and cultural permanence.