A descendant of the famous Patek Philippe World Time watches launched during the 1930s — and which have become cult models among keen travelers and collectors — Reference 5230 was introduced in 2016. For the first time, Patek Philippe is interpreting this cosmopolitan timepiece in a platinum case combined with a blue dial and strap. The dial center is adorned with a new circular hand-guilloched motif. The ultrathin self-winding movement with its two city and 24-hour rotating disks serves to keep simultaneous and permanent track of the time in all 24 time zones. Thanks to an ingenious mechanism patented in 1999, the user can simultaneously correct all the World Time displays in one-hour increments by simply pressing the pusher at 10 o’clock.