Rolex Datejust 31 mm

Rolex Datejust 31 mm, reference 278384RBR-0008, measures 31 mm across in a case combining steel and gold. The bezel is diamond-set, and the crystal is sapphire with a Cyclops lens over the date. Inside is the self-winding calibre 2236, a Superlative Chronometer movement with a power reserve of approximately 55 hours. The dial is white mother-of-pearl set with diamonds, paired with a central seconds display and date function. As a chronometer, it carries Rolex's own certification for accuracy after casing. The screw-down crown is a further protective feature of the Oyster case. It comes on a steel bracelet closed by a concealed folding clasp. The watch is waterproof to 100 metres.