Entirely developed and produced within the Cartier Manufacture, the Calibre 9909 MC is the first multiple time zone movement to feature in the Fine Watchmaking Collection, housed in a Calibre de Cartier watch.
The multiple time zone complication, sometimes known as “hours of the world”, indicates the time in several cities simultaneously or individually on demand.
Cartier now presents a new version of the multiple time zone complication, which aims to provide:
- all the information a modern traveller requires: the home time with day/night indication, the traveller time, adjustment for summer time and – a spectacular innovation – the time difference between the two selected time zones!
- excellent readability of all the functions in a limited space
- simple setting and checking of all functions and displays.
“Home” time is indicated on the lower dial in the centre of the watch by a day/night hand featuring sun and moon symbols. “Traveller” time is shown by the main hands, which enable the second time zone to be read directly.
The self-winding Calibre 9909 MC differs from standard multiple time zone movements in that its cities disc is completely integrated into the movement and is visible in a lateral magnifier rather than on the dial.
This ingenious mechanism shows the cities on the side of the watch, which avoids overloading the dial. The time in each of the 24 reference cities is read by pressing the pivoting push-piece.
Each press reveals a different city, its local time and the time difference between the home time and the traveller time!
As a final innovation, the Calibre de Cartier multiple time zone watch takes the change to and from summer time into account, an important feature in several countries around the world. To achieve this, the reference scale on the cities disc simply needs to be altered for the five months during which summer time is in operation.
