Case material: Steel; Charge: Automatic; Conditions: New Presentation condition : With dealer guarantee ; Model: Constellation Price on request Gmtbroker Reference: 123.20.31.20.13.001 Omega 123.20.31.20.13.001 Complete Details: Brushed 18kt rose gold and stainless steel case and bracelet Brown dial with 11 index 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 12320312013001