Rolex Lady-Datejust 31 Mother Of Pearl Dial 18K Yellow Gold President Automatic Ladies Diamond Watch 178288MDP. 18kt yellow gold case with a 18k yellow gold Rolex President bracelet. Fixed - 18kt yellow gold diamond-set bezel. Mother of pearl dial with yellow gold-tone hands and diamond hour markers. Automatic movement. Scratch resistant sapphire crystal. Screw down crown. Case diameter: 31 mm. Round case shape. Concealed Crown clasp. Water resistant at 100 meters / 330 feet. Functions: date, hour, minute, second.