Breguet Classique Tourbillon 3797

Breguet's Classique Tourbillon 3797, reference 3797PT/1E/9WU, comes in a 41 mm platinum case. The case measures 11.7 mm thick, with lugs set at 21 mm wide. A sapphire crystal covers the silver dial, which carries a guilloché finish and a display back reveals the movement's finishing. The manual-winding calibre 558 QP2 drives the watch, offering 50 hours of power reserve, and combines a tourbillon with a perpetual calendar and small seconds. This is a perpetual calendar watch built around Breguet's own architecture rather than a common template. The case closes on an alligator leather strap fitted with a platinum folding clasp. Breguet rates the case to 30 metres.