Omega · Automatic

8939

The 8900 with a world-time layer: a 24-hour disc turns at the centre of the dial against a ring of reference cities, so the Aqua Terra Worldtimer reads every zone at once. Like the rest of the family it is a Master Chronometer, tested by METAS to hold zero to plus five seconds a day after exposure to 15,000 gauss, and it runs a co-axial escapement.