At 31 mm, this Datejust 31 wears a round White Rolesor case constructed from a combination of Oystersteel and white gold, featuring a monobloc middle case, solid screw-down case back, and a screw-down Twinlock winding crown for waterproofness to 100 metres. The domed bezel is set with diamonds, while scratch-resistant sapphire crystal protects the dial and houses a Cyclops lens positioned over the date window.
The silver dial offers a highly legible Chromalight display with long-lasting blue luminescence. The Oyster bracelet is composed of three-piece solid links in Oystersteel and fastens via a folding Oysterclasp equipped with an Easylink 5 mm comfort extension link for easy adjustability on the wrist.
Powering the watch is Rolex's perpetual, mechanical, self-winding Calibre 2236, COSC certified and accurate to -2/+2 seconds per day after casing. It operates with a Syloxi silicon hairspring of patented geometry, high-performance Paraflex shock absorbers, bidirectional winding via a Perpetual rotor, and a power reserve of approximately 55 hours. Functions include centre hour, minute, and seconds hands, an instantaneous date with rapid setting, and stop-seconds for precise time adjustment.
