Vacheron Constantin is a maison that has always embraced the spirit of travel. Founded in Geneva in 1755, it established a presence in the United States as early as 1832 and in China by 1845—during an era when astronomers and traders were beginning to consider how to standardise time to support the increasingly frequent ocean-going voyages of the day.
The Long March of History
In 1884, the Greenwich meridian was recommended as the global reference line for two main reasons. The first was that the United States had already adopted Greenwich as the basis for its national time zone system. The second was that, by the late nineteenth century, 72% of the world’s maritime trade relied on charts using Greenwich as the prime meridian. Thus, the division of the globe into 24 time zones was established. Over time, several countries chose local times that did not correspond to full-hour differences from what is now known as UTC, as the determination of local time has always been the prerogative of each nation. Among these are Iran (UTC +03:30), Afghanistan (UTC +04:30), and India (UTC +05:30). Later still, quarter-hour deviations appeared, such as in Nepal (UTC +05:45), while one of the most recent adjustments came in 2007, when Venezuela set Caracas time to UTC –04:30. In total, 43 time zones are in use today, 37 of them throughout the year — and it is precisely these 37 that the Patrimony World Time displays.
A Direct Descendent
The timepiece was unveiled at the much-missed International Fine Watchmaking Show (SIHH) in 2011. It embodied a long-standing tradition within the Maison, whose first world time watch dates back to 1932 — just one year after the ingenious Louis Cottier invented the principle itself. That piece, reference 3372, already displayed the time in 31 cities, a number later increased to 41 with reference 4414, released by the Manufacture in the 1940s. The Calibre 2460 WT is a direct descendant of this lineage, featuring a display composed of three parts: a dial adorned with a Lambert projection map at the centre of the city display, an hour disc, and a minute ring.
Arts and Technology
Two different methods are used to indicate day and night-time zones, depending on the model. The first is a simple yet intuitive approach: a 24-hour disc divided into midnight blue and lighter halves. The second, more sophisticated system features a sapphire crystal dial placed over a Lambert projection map, where a shadow gracefully moves across each country as night falls—from 6 p.m. to 6 a.m. The result is a realistic and enchanting spectacle, giving the impression of gazing down upon the Earth from space, watching it rotate in real time. Despite its technical complexity, the movement remains remarkably easy to use. The wearer simply selects their reference city and positions it opposite the triangle at 6 o’clock; the local time can then be read either from the watch’s hour hand or the 24-hour disc, while the time in the remaining 36 zones appears simultaneously. In the images, the central hands—and the triangle at 6 o’clock, here adjacent to Geneva—indicate 10:10. The 42.5 mm watch bears the prestigious Geneva Seal in recognition of its exceptional finishing. Initially released in 2011 in white gold or pink gold, it was followed in 2014 by a ten-piece limited edition in platinum. Since 2016, the Calibre 2460 WT has also been part of the Maison’s Overseas collection.
