Till the end of the 19th century each city used its own time based on observation of the sun. For example, the United States had about 115 official local times. In 1870, the Canadian engineer Sandford Fleming introduced a worldwide system, having divided the world into 24 time zones. The system was gradually adopted by all countries of the world. In 1935, the Genevan watchmaker Louis Cottier developed a timepiece indicating the time in all 24 time zones.
The opaline dial features two hands in luminescent material and a clearly visible seconds hand. The creators of the timepiece wanted the dial to show the meridians, while maintaining its supreme readability. The dial is edged by a beveled ring with the names of the 24 cities and by the 24-hour day/night disk. The date aperture is found at 2 o’clock. The 30-minute counter is positioned at 9 o’clock, the small seconds counter at 3 o’clock, and the 12-hour aperture at 6 o’clock. The hour markers are also provided with luminescent material.
Although the new Traveller ww.tc watch boasts its mechanical complexity, it is absolutely user-friendly. The single screwed crown found at 3 o’clock is to be used for regulating all the watch’s functions. The crown has three notches. The first position is for setting the city index, the second for setting the date and the third for setting the time, the minute and the 24-hour ring.
The ergonomic design of the watch is completed with an extremely flexible rubber strap covered in velvet look alligator leather.
The new Girard-Perregaux Traveller ww.tc watch has been created in three other variations: a matte black dial and a steel case, a silvered opaline dial and a titanium case, and a silvered opaline dial, a black ceramic bezel and a steel case.