The Rolex Datejust reference 278381RBR-0001 features a 31mm case crafted from a combination of rose gold and stainless steel. This model is powered by the automatic winding Rolex caliber 2236, ensuring precise timekeeping. Introduced in 2018, it includes a date function and is certified as a chronometer. The watch showcases a rose gold bezel, adding to its overall design.