Breguet Marine Hora Mundi White Gold — World-Map Blue Dial & Rubber Strap | Ref. 5557BB/YS/5WV

The second variant of the Marine Hora Mundi in white gold — the 5557BB/YS/5WV — shares with its bracelet-equipped counterpart the same 43.9 mm case, the same calibre 77F1 movement with its approximately 55-hour power reserve, and the same magnificent blue world-map dial. Where the two references diverge is in their choice of strap: the 5WV suffix denotes a blue rubber strap, an option that transforms the character of the watch from formal instrument to sporting companion without diminishing its technical or intellectual credentials in the slightest. The result is a watch of genuine versatility, equally comfortable against a French cuff as against a wetsuit cuff, and resistant to 100 metres of water pressure regardless of the context.

The calibre 77F1's world-time complication functions by means of a pusher at 10 o'clock that advances the hour display in discrete one-hour steps, allowing the traveller to leap between any of the world's 24 principal time zones instantaneously and without disturbing the movement's regulation. The blue dial — hand-enamelled with cartographic detail that references the tradition of marine mapping — functions simultaneously as a decorative masterpiece and a practical reference, its continents rendered in tones that distinguish landmass from ocean with immediate legibility. The white gold case and sapphire exhibition caseback are finished to the same exacting standards as the bracelet variant.

At $58,160 — a meaningful reduction from the bracelet configuration — the 5557BB/YS/5WV offers the complete Hora Mundi experience in a presentation more suited to active lifestyles and warmer climates. For collectors who travel extensively and prefer a watch that can traverse time zones and swimming pools with equal equanimity, this reference stands as one of the most intelligently conceived and beautifully executed world-time instruments currently in production.