The movement is Omega Caliber 1128. It's a ETA 2893 with 2 extra jewels, improved winding efficiency and Omega finishing. The 2893 is the 2892-A2 with a GMT module.
Hours, minutes, sweep seconds.
Self-winding mechanism with ball bearing.
Date indicator, corrector.
Stop second device.
Regulator system ETACHRON and regulator corrector.
28.800 vibrations per hour; 4 Hz.
24 hour hand or second time zone.
21 Jewels.