The Rolex Datejust 31 (Reference 278381RBR) is a luxury mid-size timepiece featuring an exquisite blend of 18K Everose gold and Oystersteel (Rolesor), a factory original Rolex diamond bezel, and a stunning Mother of Pearl (MOP) dial set with diamond hour markers .

• Case Size: 31mm (often referred to as the modern mid-size or "Medium" size), offering a highly versatile presence on the wrist. 

• Materials: Everose Rolesor, Rolex's patented combination of highly corrosion-resistant Oystersteel and proprietary 18K rose gold. 

• Bezel: Original factory-set diamond bezel, featuring meticulously selected diamonds brilliant-cut and set directly by Rolex gemologists. 

• Dial: Natural Mother of Pearl (MOP), meaning every individual dial is unique with distinct iridescence and reflections, paired with 10 factory diamond hour markers. 

• Movement: Powered by the Rolex Calibre 2236, a self-winding mechanical movement equipped with a Syloxi hairspring for supreme resistance to shocks and temperature variations. It carries a power reserve of approximately 55 hours. 

• Bracelet Options: Typically available on either a sporty 3-piece Oyster bracelet or the more formal, fluid 5-piece Jubilee bracelet, both outfitted with the Easylink comfort extension link.