The Rolex Datejust 31 reference 278285RBR-0018 is a mid-size luxury timepiece featuring a 31mm case crafted from 18 kt Everose gold, a proprietary rose gold alloy developed by Rolex. This model is distinguished by a rosé-color dial with a sunray finish that creates subtle light reflections moving with the wearer’s wrist. The aesthetic is further enhanced by a fixed bezel factory-set with 46 diamonds and a signature President bracelet, which consists of semi-circular three-piece links and a concealed folding Crownclasp. The watch utilizes a scratch-resistant sapphire crystal with a Cyclops lens over the date window and a Twinlock screw-down crown to ensure a water resistance of 100 meters.
Powering the timepiece is the manufacture caliber 2236, a self-winding mechanical movement that provides a power reserve of approximately 55 hours. This movement is equipped with a patented Syloxi hairspring in silicon, which is insensitive to magnetic fields and provides high stability in the face of temperature variations. The watch features center hour, minute, and seconds hands, along with an instantaneous date display and stop-seconds for precise time setting. As a Superlative Chronometer, it maintains a precision of -2/+2 seconds per day after casing.
General reviews of the Datejust 31 series highlight its status as a versatile and refined choice, often noted for perfectly balancing classic Rolex styling with a contemporary size that offers significant wrist presence. Owners frequently praise the comfort of the President bracelet and the durability of the Everose gold construction. While the diamond-set bezel and precious metal build place it at a high market value, the model is widely regarded as a symbol of sophistication and technical reliability, suitable for both daily wear and formal occasions. Criticism is rare but occasionally notes that the 31mm size may be too small for those preferring a more modern, larger profile.