Rolex Day-Date 40 mm

The Rolex Day-Date 40 mm, reference 228398TBR-0038, comes in 18 ct yellow gold and measures 40 mm across. The case stands 12 mm thick, built around a monobloc middle case and screw-down winding crown. A diamond-set bezel surrounds the onyx dial, which is itself set with diamonds. The date sits under a Cyclops lens on the scratch-resistant sapphire crystal. Inside is the self-winding calibre 3255, a chronometer-certified movement giving approximately 70 hours of power reserve, with day and date shown in apertures. The watch is fitted to a President bracelet in yellow gold with a concealed folding Crownclasp. That screw-down crown, using the Twinlock double waterproofness system, keeps the case sealed to 100 metres.