Rolex Datejust 31 mm

The Rolex Datejust 31 mm, reference 278243-0015, comes in a 31 mm case of steel and gold. The case has a domed bezel and carries a sapphire crystal with a Cyclops lens over the date. Inside is the calibre 2236, a self-winding mechanical movement with a power reserve of approximately 55 hours and Superlative Chronometer certification. The olive green dial is set with diamonds and includes a central seconds hand and instantaneous date. The screw-down crown adds to the watch's protection against moisture, and the case is fitted on a steel and gold bracelet with a folding Oysterclasp and Easylink comfort extension link. This Datejust, a chronometer, is rated to 100 metres of water resistance.