Rolex Datejust 31 mm

Rolex's Datejust 31 mm, reference 278341RBR-0020, is built with a 31 mm case in steel and gold. The Oyster case pairs a screw-down crown with a sapphire crystal and Cyclops lens over the date. Inside is the self-winding calibre 2236, a Rolex manufacture movement certified as a Superlative Chronometer with 55 hours of power reserve. The bezel is domed and set with diamonds, matching the aubergine dial, which is also set with diamonds. Central seconds and a date display round out the functions. The bracelet is steel and gold with a concealed folding clasp. Rolex rates the case to 100 metres.