Breguet Marine Tourbillon 5577

Breguet's Marine Tourbillon 5577, reference 5577PT/Y2/9WV, comes in a 42.5 mm platinum case. The case measures 9.4 mm thick, with lugs set 24.5 mm apart. Inside is the self-winding calibre 581, an 80-hour movement built around a peripheral oscillating weight that leaves the tourbillon and finishing visible through the sapphire crystal. The blue dial has a sunburst finish and carries small seconds along with the tourbillon cage at 5 o'clock, and the hands are luminous. A screw-down crown protects the movement, and the sapphire display back at the rear confirms the open architecture. Breguet pairs the case with an alligator leather strap on a platinum folding clasp. Water resistance stands at 100 metres.