Case material: Steel; Charge: Automatic; Conditions: New Presentation condition : With dealer guarantee ; Model: Constellation Lady Price on request Gmtbroker Reference: 123.20.31.20.55.002 Omega 123.20.31.20.55.002 Complete Details: Brushed 18kt yellow gold and stainless steel case and bracelet White mother-of-pearl dial with 11 diamond hour markers Displays date at 3 o'clock Omega 8520 Co-Axial Escapement movement Power Reserve: about 50 hours This watch is also known as 12320312055002