News 
Breguet has unveiled the fifth chapter in its 250th anniversary celebrations, a brand-new 50-piece limited edition named Marine Hora Mundi 5555. The timepiece pays tribute to craftsmanship with a dial on two superimposed levels, one guilloché and the other sapphire. This special dial is inspired by NASA’s “Black Marble”, a nocturnal vision of the Earth.
By opting for a night view, the Hora Mundi 5555 celebrates a world in motion, where city lights remind us that the Earth never sleeps: a perfect nod to a watch designed for frequent travellers. Offered for the first time in Breguet gold, this Hora Mundi 5555 also features a new dial decorated with phosphorescent enamel, the subject of a patent application.
The new Marine Hora Mundi 5555 is based on the timepiece in the current collection: 43.9mm case, Calibre 77F1 with pre-programmable instant-jump dual-time display, date, day/night indicator and synchronised city. But that’s where the comparison ends. Beyond that, everything about the Hora Mundi 5555 is new, starting with its dial.
What sets it apart at first glance is its deep, rounded effect. This is the result of an exclusive construction. It is in fact based on two elements. On the one hand, a gold base dial, adorned with a gradient from sky blue to navy blue symbolising the merging of sky and sea: a sight that inspired the creation of the timepiece. The base is then finely hand-guilloché with meridians and parallels. It is flat yet offers the trompe-l’œil effect of a truly curved Earth. The illusion is created by the lines representing the meridians and parallels.
The second component is its depth. The aim is to give the illusion of a viewpoint taken from space, as if the collector were observing the Earth from the thermosphere. To achieve this, Breguet has topped the guilloché dial with a translucent sapphire crystal.
This sapphire dial brings together an unparalleled array of artistic skills. It is entirely hand-painted in three phases, on both sides. First, all the continents are crafted in miniature enamel. As the sapphire crystal is also flat, the contours of the continents are refined as they approach the flange, transferred by pad printing in transparent petit feu enamel. Breguet craftsmen then enamel within these lines. These continents are painted on the reverse side of the sapphire crystal.
To underline the uniqueness of this limited series of 50, Breguet has enriched its Hora Mundi 5555 with numerous details that make it different and unique. For the first time, the Marine case is made of Breguet gold. Especially for this limited edition, its central lug is polished. The juxtaposition of polished and satin-brushed finishes accentuates the beauty of the new Breguet gold.
The back features the double edging of the special 250th anniversary guilloché pattern, known as Quai de l’Horloge. The sapphire crystal caseback, bearing the anniversary logo like the other models in the 250th anniversary collection, reveals the intricate workings of Calibre 77F1, whose oscillating weight is also made of Breguet gold for the first time. As for the dial, each collector of one of the 50 examples of the Hora Mundi 5555 will be able to personalise the city disc if they so wish.
October 02, 2025