Patek Philippe

The world time watches were introduced in the 1930s by Louis Cottier, an independent Swiss watchmaker with a first rate reputation. Cottier's world time watches displayed the time in all of the world's 24 time zones simultaneously, he developed them with a number of brands during the 30s and 40s, including Rolex and Vacheron Constantin, but his best known collaboration was with Patek Philippe. In 1953, the reference 2523 was the first world time watch to have two crowns, making it one of the rarest and most popular models for present day collectors.

The world time complication was reintroduced in the the year of 2000 and instead of having a second crown, this time it features a pusher, the reference 5110, still works largely in the same way as the 2523, listing 24 cities, one in each time zone along the outer ring on the dial, position the city that you are currently in at 12 o'clock position, the hour and minutes hands will show the time in that city, the other cities line up with a second 24 hour ring that rotates counter clockwise. Just a simple click of the pusher at 10 o'clock, you can change the time zone, advance the hour hand by one hour, the city and 24 hour discs to move one increment counter clockwise.