Description

The present reference is the Breguet Classique Hora Mundi ref. 5719, an extraordinary high-jewellery grand complication that unites an ingenious mechanical travel complication with virtuoso gem-setting. Standing as the first mechanical timepiece endowed with an instant-jump time-zone display with a mechanical memory function, this masterpiece allows the wearer to switch instantaneously between two pre-selected time zones at the press of a single pusher.

The substantial 46 mm platinum case, measuring 15.1 mm in thickness with a 23 mm lug width, serves as a canvas for exceptional haute joaillerie. The bezel, caseband, and lugs are lavishly encrusted with 166 baguette-cut diamonds, totaling over 17 carats of diamonds and sapphires across the piece. The case features a non-screwed crown, a water resistance of 3 bar (30 metres), and an exhibition sapphire crystal caseback that reveals the movement’s hand-crafted architecture.

The dial is an artistic tour de force, featuring a sandblasted finish coated in translucent blue varnish lacquer (laque vernis bleu). It is sumptuously set with 76 baguette-cut diamonds, 111 brilliant-cut diamonds, and 83 baguette-cut sapphires, evoking a glittering celestial hemisphere. Time is indicated by traditional blued steel Breguet open-tipped “hollow apple” hands, tracking across apertures for the city disk, day/night indicator, and synchronised date display.

Beating within is the manufacture automatic Calibre 77F1, composed of 384 finely finished components, measuring 36 mm across and 6 mm in height. Operating at a frequency of 4 Hz (28,800 vibrations per hour) with a 55-hour power reserve, the movement incorporates modern anti-magnetic technology via a flat silicon balance spring mounted on a proprietary Breguet balance wheel. Its signature complication recalculates and simultaneously jumps the hour hand, date, and day/night indication between the two memorised time zones without disrupting timekeeping precision.

Fitted with an alligator leather strap secured by a platinum three-blade folding deployant clasp set with an additional 46 brilliant-cut diamonds, the Classique Hora Mundi ref. 5719 stands at the apex of Breguet’s modern creations, effortlessly bridging pioneering horological engineering with imperial jewellery craft.