Rolex Datejust 31 mm

Rolex Datejust 31 mm, reference 278344RBR-0008, has a 31 mm case in steel and gold. The dial is dark grey and set with diamonds, matched to a domed, diamond-set bezel. A Cyclops lens sits over the date on the scratch-resistant sapphire crystal. Inside is calibre 2236, a self-winding chronometer movement with a power reserve of around 55 hours. The watch keeps the Datejust's central seconds and date functions, with a screw-down crown for added security. It is fitted on a steel bracelet with a concealed folding clasp. The screw-down crown, part of the Twinlock system, helps hold the case to its 100 metre water resistance rating.