foversta[PuristSPro Moderator]
20814
Very quickly...
I can say, if we are speaking about the contemporary worldtimers:
- the 240 movement
- the ability to read the time of the 24 timezones at the same time
- easy to operate, easy to understand
- a clever complication by Louis Cottier
- an iconic design coming from the original watch
- the feeling to travel in your head
...
- the charm of the watch:

To understand how it works:
the city of reference is located at 12 o'clock (here Paris). It is 4:05 pm in Paris Thanks to the cities and hours independant rings, I can read the time everywhere in the world (7:05 am in LA). The pusher is used to change the city of reference.
Hope it helps.
Fx
Very quickly...
By: foversta : August 19th, 2013-11:45
I can say, if we are speaking about the contemporary worldtimers: - the 240 movement - the ability to read the time of the 24 timezones at the same time - easy to operate, easy to understand - a clever complication by Louis Cottier - an iconic design comi...
For travel
By: alphabeta81 : August 19th, 2013-19:44
If you really want easy of time reading, I think the Ulysse Nardin GMT +/- is untouchable. Far easier than the 5110 or 5164. So I don't think the point is sheer readability but rather the world timer's feel for travel and being able to know what time it i...
It is a shame..
By: paulus : August 20th, 2013-01:19
Because the points raised are so true: - You can't see the time in the dark (kind of useful with a world timer!) - As daylight savings, time is often wrong, which is kind of unprofessional in my world (but perhaps not yours) But it IS a beautiful watch fo...
The mechanism of 5110.
By: Grisar : August 20th, 2013-06:05
For your better understanding. Attached picture explains that both the city ring and the 24 hour ring can rotate. The 24 hour ring rotates by it self all the time in accordance with the minute and hour hands while the city ring only jumps when you push th...