Stainless steel case with a red leather strap. Diamond set bezel. White mother of pearl dial with silver-tone hands and Arabic numeral hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands and markers. Chronograph - three sub-dials displaying: 60 second, 30 minute and 12 hour. Omega Calibre 3220 automatic movement with a 40-hour power reserve. Scratch resistant sapphire crystal. Case size: 35.5 mm. Round case shape. Water resistant at 30 meters / 100 feet. Functions: chronograph, hour, minute, small second. Luxury watch style. Watch label: Swiss Made. Item Variations: 3815 79 40, 3815-79-40, 3815/79/40, 38157940. Omega Speedmaster Automatic Diamond Ladies Watch 3815.79.40.