Two world-time watches ? the IWC Pilot’s Watch Worldtimer and the Montblanc Heritage Spirit Orbis Terrarum ? duke it out on the wrist in this comparative review from the WatchTime archives. Original photos by OK-Photography.

How does it go again" Do I set my watch forward or back on my way to China" Is my business partner in Dubai awake or asleep" A world-time watch can answer all such questions.
The pilots?-watch look of the IWC Pilot?s Watch Worldtimer conveys both the reason and need for this kind of timepiece. Pilots orient themselves solely on the coordinated world time known as UTC. The Worldtimer is the obvious next step in development from the 1998 IWC pilots? watch and its second time zone ? helping travelers who quickly move through different time zones keep their home time in mind. It can also help managers keep track of business partners in various locations around the world. The Worldtimer has maintained the look of a typical IWC pilots? watch with its white numerals, markers and hands, clear minutes track and prominent triangular orientation marker at 12 o?clock. The matte, black background improves legibility, and luminous material on essential elements means you can read the watch in the dark. The elongated date window (which mimics the look of an airplane altimeter) is new, as are the city and 24-hour day/night rings for the world-time function. Both adhere to the black-and-white pilots?-watch design code and are just as easy to read a...