Breguet Marine Tourbillon Equation Marchante 5887

Breguet's Marine Tourbillon Equation Marchante 5887, reference 5887PT/YS/PW0SL, has a 43.9 mm platinum case. The case measures 11.8 mm thick and the lugs take a 24.5 mm strap. A sapphire crystal covers the dial and a sapphire caseback shows off the hand-finished movement. Inside is the self-winding calibre 581DPE, with an 80-hour power reserve and a titanium tourbillon carriage at 5 o'clock. The blue dial, guilloché and enamelled by hand, carries a perpetual calendar with date, a running equation of time and luminous hands. A platinum strap closes with a platinum folding clasp. Breguet rates the case to 100 metres, modest next to the complications it carries.