The Breguet Classique Tourbillon Skeleton (Ref. 3355PT/00/986) features a 35.5mm platinum case, hand-engraved skeleton dial with silvered guilloche hour chapter, tourbillon carriage with small seconds at 6 o'clock, black alligator leather strap, and manual-wind Caliber 558 SQ.
The Breguet Classique Tourbillon Messidor (Ref. 5335PT/42/9W6) features a 40mm 950 platinum case, openwork skeleton dial exposing a suspended 'mysterious' tourbillon cage mounted between sapphire plates, black alligator strap, and manual-wind Caliber 558 SQ2.
