The Patek Philippe World Time watch, also referred to as Heure Universelle by collectors, has ranked among the manufacture's most popular complicated wristwatches for nearly eighty years. Because some time zone designations have recently changed or were replaced with new ones, Baselworld is the ideal platform for Patek Philippe to present the new World Time watch Ref. 5230, which is replacing all previous models. The changes were a welcome opportunity to subtly rework the case, dial, and hand designs as well.
It may seem simple to divide the planet into 24 time zones with 15 degrees of longitude each, but the political process behind it is convoluted. Some time zones have meanwhile been assigned different city names, for instance Dubai instead of Riyadh or Brisbane instead of Noumea, to mention only two. Formerly, Moscow was located in the UTC+4 zone, but the Russian capital has now shifted one hour closer to Western Europe, "relocating" to UTC+3. From time to time, such changes make it necessary to modify the place names on the city scales of World Time watches. This is why Patek Philippe is discontinuing the production of its legacy World Time watches and launching the new Ref. 5230 with the updated, globally valid city names.