Simultaneous indication of 2 individual time-zones. Centre hands for hours and minutes (T1). Centre hour hand T1 with forward or backward setting device, hour by hour, commanded by two pushers. Subsidiary dial with hours and minutes (T2) at 3 h including day and night indicator. Subsidiary second at 9 h. Date window at 6 h. The date is synchronised with the centre hands T1. Automatic forward or backward rotation of date if hour hand of T1 is set forward or backward over midnight. Quick date setting device. Fine timing device and stop-second.