Breguet Marine Tourbillon Equation Marchante 5887

Breguet's Marine Tourbillon Equation Marchante 5887, reference 5887PT/YS/5WVSL, has a 43.9 mm platinum case. It measures 11.8 mm thick, with lugs set 24.5 mm apart. The dial sits under a sapphire crystal and shows a hand-guilloché blue finish with luminous hands. Inside is the self-winding calibre 581DPE, offering 80 hours of power reserve and combining a tourbillon with a perpetual calendar and a running equation of time, complications rarely found together in one movement. A sapphire caseback exposes the hand-finished bridges. The watch is fitted to a rubber strap with a platinum folding clasp. Breguet rates the case to 100 metres.