Rolex Datejust 31 mm

The Rolex Datejust 31 mm reference 278240-0001 is a women's model in Oystersteel with a 31 mm case and a domed bezel. The bright black dial is paired with an Oyster bracelet and protected by a sapphire crystal. It runs on the self-winding caliber 2236, a chronometer movement with 55 hours of power reserve, and carries a date function along with water resistance to 100 meters.