Two years after Patek Philippe launched its inaugural collection of grand complications for women, the Swiss watchmaker has revealed the World Time Ref. 7130 in red gold, which gives the time at the wearer's location and in all of the planet's time zones. World Time watches were originally developed in the 1930s as the ultimate jet-set travel accessory. Wearers simply had to consult their watch to discover the time in 24 of the world's most exotic cities. Rather than changing the hour hand, the Patek Philippe World Time Ref. 7130 allows you to switch to the local time in your destination by simply depressing the pusher at 10 o'clock, while the city ring and 24-hour ring move counter-clockwise. This is made possible by Patek's complex automatic winding calibre 240 HU movement. Set with 62 diamonds around the hand-guilloched hour dial, the Ref. 7130 is an exquisitely feminine take on this classic grand watch complication.