Breguet Classique Double Tourbillon Quai de l'Horloge 5345

Breguet's Classique Double Tourbillon Quai de l'Horloge 5345, reference 5345PT/1S/7XU, has a platinum case measuring 46 mm across. The case stands 16.9 mm thick, with lugs set 23 mm apart. A sapphire crystal covers the dial and reveals the manual-winding calibre 588N, a gold-finished movement of 740 components carrying two independent tourbillons linked by a central differential, their combined rotation driving a bridge that doubles as the hour hand. Central seconds complete the display. Power reserve runs to 60 hours. The gold dial pairs with a rubber strap on a platinum folding clasp. A sapphire display back shows the finishing work on the movement. Breguet rates the case to 1.6 bar, a nominal figure rather than a practical depth rating.