Dual time zone
The time in two time zones is displayed simultaneously.
The reference time can be read by means of a red triangle pointing to an off-centre disc. The disc’s 24-hour graduation allows travellers to distinguish daytime hours from night-time hours in the reference time zone (for example, 10 a.m. versus 10 p.m.).
Local time is indicated by the conventional centre hour, minute and seconds hands. It can be set quickly by means of a mechanism that allows the hour hand to be adjusted independently in one-hour increments both forwards and backwards.