Considered the true test of Patek Philippe's watch-making credentials, the Complications and Grand Complications collections encompass a wide range of ingenious timepieces which have uses far beyond simply keeping track of time. Dual time zones, world time features and annual calendars are just some of the more basic 'complications' found on these watches, making them ideal for travellers and buyer's seeking substance as well as style. Meanwhile, the more advanced Grand Complications models provide access to even greater amounts of information, with features ranging from astronomical calendars to moon phase indicators, sky charts and more.