18kt yellow gold case and bracelet. Fixed 18kt yellow gold bezel engraved with roman numerals. Silver dial with 18kt yellow gold hands and index hour markers. Minute markers around the outer rim. Dial Type: Analog. Omega Calibre 8801 Automatic movement, based upon Omega 8800, containing 35 Jewels, bitting at 25200 vph, and has a power reserve of approximately 55 hours. Scratch resistant sapphire crystal. Transparent case back. Round case shape, case size: 39 mm. Fold over clasp with a safety release. Water resistant at 50 meters / 165 feet. Functions: date, hour, minute, second, co-axial escapement, chronometer, magnetic resistant. Constellation Series. Luxury watch style. Watch label: Swiss Made. Omega Constellation Automatic Chronometer Silver Dial 18kt Yellow Gold Ladies Watch 131.50.39.20.02.002.