Breguet Marine Hora Mundi 5557

Breguet's Marine Hora Mundi 5557, reference 5557BR/YS/9WV, is a GMT watch cased in 18K rose gold measuring 43.9 mm across. The case stands 13.8 mm thick, with lugs spaced 24.5 mm apart, and a screwed crown works alongside a pusher to shift the second time zone without disturbing the running of the watch. The self-winding calibre 77F1 provides 55 hours of power reserve and is visible through a sapphire caseback. A sapphire crystal covers the blue dial, its guilloché finish done by hand, with luminous hands set against it. Beyond the GMT function, the watch carries a date display and a central seconds hand. Breguet fits it to an alligator leather strap with a rose gold folding clasp. The case is rated to 100 metres of water resistance.