
Girard-Perregaux, originally founded in 1791, is a haute horology manufacture located in La Chaux-de-Fonds, Switzerland and is part of the Sowind Group. Created in 2000, the ww.tc (World Wide Time Control) collection quickly became one of the Girard-Perregaux Manufacture's iconic lines (and a personal favorite of mine aside from the awkward name "ww.tc"). The "World Time" function provides a simultaneous display of all time zones on its dial. The secret of its exclusive system is a coupling mechanism used for driving a ring displaying the time for 24 time zones, represented by the same number of cities. The hour ring has a day/night contrast function which makes it easier to read.
Girard-Perregaux is a true manufacture (meaning they produce at least one caliber in-house). This particular movement is the GP033C0 calibre, a robust self-winding mechanical movement with 63 jewels. It runs at 28,800 vph (or 4 Hz, which is the most common rate for an automatic mechanical movement) and features a 46 hour power reserve.
Its finishes, which can be seen through the sapphire caseback, are examples of the finest watchmaking tradition: circular graining on the main plate, Côtes de Genève on the bridges and oscillating weight, and blued steel screws.
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