Breguet Marine Hora Mundi White Gold — World-Map Blue Dial | Ref. 5557BB/YS/BW0

The Hora Mundi 5557 is perhaps the most intellectually ambitious creation in the Marine collection, a watch that extends Breguet's navigational heritage into the realm of world-time complications with a solution of genuine originality. Rather than the conventional disc or subdial approach, the 5557BB/YS/BW0 presents a blue dial hand-painted with a detailed world map — an image that serves both as a functional reference point and as a direct evocation of the cartographic traditions of the Age of Sail, when Breguet himself was supplying precision instruments to the French and British naval establishments.

The calibre 77F1 self-winding movement at its core offers approximately 55 hours of power reserve — among the most generous reserves in the Marine line — and allows the wearer to switch instantly between any two of the world's time zones by means of a clever pusher mechanism that advances the hour hand in one-hour increments without interrupting the movement's regulation. The 43.9 mm white gold case, measuring 13.8 mm in depth, frames the dial with appropriate authority, its brushed and polished surfaces reflecting light in the manner characteristic of Breguet's Vallée de Joux workshops. The sapphire caseback reveals the beautifully decorated rotor and bridges of the calibre 77F1.

A titanium integrated bracelet provides the bracelet configuration for this reference — 5557BB/YS/BW0 — combining the structural rigidity of a purpose-engineered link design with the lightweight practicality suited to frequent international travel. Water resistant to 100 metres, the Marine Hora Mundi is a watch built for the modern navigator: one who crosses time zones in pressurised cabin rather than under canvas, but who appreciates the unbroken line of horological tradition that connects his instrument to the great marine chronometers of the past. Priced at $77,120, it is an investment in functional poetry.