Rolex Datejust 31 mm

Rolex Datejust 31 mm, reference 278344RBR-0021, in steel and gold, measures 31 mm across. The domed bezel is set with diamonds, matching the gemstones noted on the case. A sapphire crystal with Cyclops lens sits over the date, and the pink dial is fitted with a screw-down crown for added security. Inside is the self-winding calibre 2236, a chronometer movement with a power reserve of approximately 55 hours. The watch shows the date and central seconds. It comes on a steel bracelet fitted with a folding Oysterclasp that includes an Easylink comfort extension link, the clasp finished in steel and gold. The screw-down crown, part of the Twinlock system, helps hold the case to its 100 metre rating.