18kt yellow gold case and bracelet. Fixed 18kt yellow gold bezel. White mother of pearl dial with yellow gold hands and diamond hour markers. Dial Type: Analog. Luminescent hands. Date display at the 3 o'clock position. Omega Calibre 8521 Automatic movement, based upon Omega 8520, containing 28 Jewels, bitting at 25200 vph, and has a power reserve of approximately 50 hours. Scratch resistant sapphire crystal. Pull / push crown. Transparent case back. Round case shape, case size: 31 mm. Band width: 19 mm. Water resistant at 100 meters / 330 feet. Functions: date, hour, minute, second, co-axial escapement, chronometer. Constellation Series. Luxury watch style. Watch label: Swiss Made. Omega Constellation Automatic 18kt Yellow Gold Diamond White Mother of Pearl Dial Ladies Watch 123.50.31.20.55.002.