The Rolex Datejust 31 reference 278344RBR-0007 is a sophisticated mid-size luxury timepiece featuring a 31mm case crafted from White Rolesor, which is a signature Rolex combination of Oystersteel and 18k white gold. This model is distinguished by its dark grey rhodium dial adorned with diamonds and a polished bezel set with 24 diamonds in an asymmetrical “star” pattern. The watch is paired with a durable three-piece link Oyster bracelet that includes a folding Oysterclasp and the Easylink 5mm comfort extension link for easy adjustments.
Internally, the timepiece is powered by the high-performance caliber 2236, a self-winding mechanical movement entirely developed and manufactured by Rolex. This movement features a Syloxi hairspring in silicon and high-performance Paraflex shock absorbers, providing a power reserve of approximately 55 hours and a precision of -2/+2 seconds per day. The watch is equipped with essential complications including center hour, minute, and seconds hands, along with an instantaneous date window at 3 o’clock magnified by the iconic Cyclops lens. Its Twinlock screw-down crown and solid case back ensure a water resistance rating of 100 meters.
General reviews of the Datejust 31 often highlight its versatility as a dress watch that remains robust enough for daily wear. The 31mm size is frequently praised for offering a modern yet elegant presence on the wrist, bridging the gap between traditional lady sizes and larger professional models. Critics and enthusiasts alike appreciate the unique aesthetic of the star diamond bezel, noting that it provides a distinctive, playful sparkle compared to the traditional fluted or fully paved diamond bezels. The inclusion of the caliber 2236 is also noted as a significant technical strength, ensuring long-term reliability and accuracy.