THE JOURNAL
A Spontaneous Trip: The Essential Time Zone Watch
Whether it is a spontaneous trip or a planned excursion, keeping track of the correct time is vital. It is worth noting that the world is divided into 24 time zones, with Greenwich Mean Time as the reference point. In response, watchmakers have developed watches that can display time in multiple zones. These time zone watches are generally divided into dual time, multi-time, and world time models.
As early as 1930,Patek Philippereleased the world-renowned “ world time watch ”, which uses two rotating discs to display the time across 24 time zones simultaneously. Today, these world time watches produced between 1930 and 1960 command astronomical prices at major auction houses.

The Patek Philippe watch features a sophisticated self-winding 240 HU movement, yet it is extremely straightforward to use. The hour and minute hands in the centre of the dial display the local time, surrounded by two rotating discs on the outer ring. The outer disc is inscribed with the names of 24 cities, representing 24 time zones. On the counter-rotating inner disc, the visible section shows a 24-hour scale ring, using a dark arc with a moon marker to indicate nighttime and a bright arc with a sun marker to indicate daytime.

Jaeger-LeCoultre watchesCombining the dial with world time zones allows the wearer to command global time right from their wrist. By turning the crown positioned at the 2 o'clock marker, you can select your preferred time zone. The subsidiary dial located at the 7 o'clock marker will then automatically display the time for that location. The outer ring of the dial rotates continuously at a speed matching the Earth's revolution.

Glashütte watchThe time display is located on the off-centre main dial, where the 24-hour hand indicates the difference between day and night. This makes setting the time and synchronising the calendar much easier. The main off-centre hour hand and the 24-hour hand can be adjusted simultaneously via the crown. When travelling across time zones, the main off-centre hour hand can be adjusted to local time in one-hour increments using the pusher on the left side of the case, while the 24-hour hand and calendar continue to display the wearer's home time.

Panerai watch, the dial of the Luminor series watch is exceptionally easy to read, displaying not only the time and calendar but also indicating a second time zone. This function is achieved via a central hand with a triangular tip that corresponds to the 24-hour scale on the outer periphery of the dial.
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