The Breguet Classique Hora Mundi Ref. 5717 is as functional as it is beautiful.

The Calibre 5717 can memorise cities in two different timezones, and changing the dial display between the two is as simple and intuitive as pressing a button. The crown-pusher at 8 o’clock activates the instant-jump timezone and synchronises the time, date, day/night indicator and city indicator.

A 44mm coin-edge platinum case frames a hand-guilloché dial decorated with a translucent blue lacquer ocean. A polished gold map is applied on the lacquer and represents Asia and Oceania. At 3 o’clock, a solid gold sun and moon rotate above a lapis lazuli sky with pyrite inclusions that represent the stars. A hand-engraved gold cloud covers the day/night indicator and is attached to the dial with two heat-blued screws.

Breguet also collaborated with the Italian pen manufacturer Montegrappa to craft fine pens inspired by Breguet’s signature coin-edge cases, guilloché dials and heat-blued pomme hands. The sterling silver barrel and cap are hand-engraved on a rose engine and accented with sterling silver fittings. The sterling silver clip is finished with a blue sapphire.

Timezone Feature