Rolex Lady-Datejust 31 Blue Concentric Circle Dial 18K Yellow Gold President Automatic Ladies Diamond Watch 178288BLCAP. 18kt yellow gold case with a 18kt yellow gold Rolex President bracelet. Fixed - 18k yellow gold diamond-set bezel. Blue concentric circle dial with yellow gold-tone hands and Arabic numeral hour markers. Minute markers around the outer rim. 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.