LANGE 1 TIME ZONE
A timekeeper for cosmopolites
The large numerals scale indicates home time, the smaller one shows that of a second zone. Each of the 24 time zones is represented by a city name on the city ring. An applied arrow marker at 5 o’clock points at the name on the city ring, which represents the time zone that is being displayed. A time-zone correction pusher allows the city ring and the zone time to be simultaneously advanced by increments of one hour, corresponding to an eastbound trip around the world.