Rolex Lady-Datejust 31 White Dial 18K Yellow Gold President Automatic Ladies Watch 178278WRP. 18k yellow gold case with a 18k yellow gold Rolex President bracelet. Fixed - fluted 18k yellow gold bezel. White dial with yellow gold-tone hands and Roman numeral hour markers. Minute markers around the outer rim. Automatic movement. Scratch resistant sapphire crystal. Screw down crown. Solid case back. Case diameter: 31 mm. Round case shape. Concealed Crown clasp. Water resistant at 100 meters / 330 feet. Functions: date, hour, minute, second.