Breguet Marine Tourbillon 5577

Breguet's Marine Tourbillon 5577, reference 5577BR/G2/9WV, has a rose gold case measuring 42.5 mm across. The case stands 9.4 mm thick and the crown screws down against the slate dial's sunburst finish. Inside is the self-winding calibre 581, an automatic movement built around a peripheral oscillating weight that leaves the tourbillon at 5 o'clock fully visible through the sapphire display back. Small seconds appear alongside the tourbillon, and the hands carry white luminous coating for visibility in low light. Power reserve runs to 80 hours. A sapphire crystal covers the dial, and the case sits on an alligator leather strap fastened with a rose gold folding clasp. Breguet rates the case to 100 metres.