This year has brought with it several new key releases from Breguet, including the latest iteration of the clever Hora Mundi, their Reference 5717 multiple time zone watch launched in 2011 that was the first mechanical jumping 24 city time zone display system with synchronised date, and day/ night indicator. The watch had a different dial showing either the Americas, Europe or Oceania, and a moon-phase indication.
This new version comes in an 18 carat white gold 43mm case with the familiar Breguet fluted band. The lugs are welded lugs with screw bars, with a screw down crown at 3 o’clock.
For those unfamiliar with it, you choose the two zone-times you want to be displayed on the dial. Once set you simply press the pusher at 8 o’clock. The window at 12 o’clock shows the corresponding date of the time zone that is displayed. This new edition has a silvered 18 carat white gold guillochéd main dial and instead of the moon phase indication, a 24-hour recessed sub dial display between 3 and 4 o’clock that indicates if it night or day in the time zone that is displayed on the dial. To swap between time zones, use the pusher at 3 o’clock. This indicator features two types of guilloché decoration.
Inside is an automatic Calibre 77F0, which consists of the base Calibre 777 with an added plate. It is 28,800 VPH and power reserve is 55 hours.
A clean and quintessentially Breguet-dialled version of this modern Breguet classic (in name and nature), on the wrist wears slightly smaller than its 43mm size, so for those who are drawn to this most enduring of Breguet styles and worried about size, take note. At a thickness of 12.6mm, it is also thinner than the Ref.5717, which is 13.55mm thick. The new Hora Mundi Ref. 5727 is also available in 18K rose gold (Ref. 5727BR/12/9ZU).