Rolex Datejust 31 mm

The Rolex Datejust 31 mm, reference 278344RBR-0017, has a 31 mm case in steel and gold. The domed bezel is set with diamonds, and the dark grey dial sits under a scratch-resistant sapphire crystal with a Cyclops lens over the date. Inside is the self-winding calibre 2236, a chronometer-certified movement with a 55-hour power reserve. Hands and indices carry luminous treatment for legibility in low light, and a central seconds hand runs alongside the date function. A screw-down crown seals the case, which is fitted to a steel bracelet with a folding Oysterclasp and Easylink comfort extension link. Rated to 100 metres, the Datejust 31 is built for daily wear rather than diving.