Breguet Marine Tourbillon 5577

Breguet's Marine Tourbillon 5577, reference 5577PT/Y2/5WV, comes in a 42.5 mm platinum case. The case measures 9.4 mm thick, with lugs set 24.5 mm apart. A sapphire crystal covers the blue sunburst dial, and the display back shows the self-winding calibre 581, with its peripheral oscillating weight and 80-hour power reserve. The tourbillon cage sits at 5 o'clock, and small seconds are integrated into the dial architecture. Hands are treated with phosphorescent coating for legibility in low light. A screw-down crown secures the case, which is fitted to a rubber strap with a platinum folding clasp. It stays water resistant to a depth of 100 metres.