Santos-Dumont Skeleton Watch with micro-rotor Ref. WHSA0031 Hamza G and the movement is on

and the movement is on show front and back through the sapphire caseback

and it can stand upright or lie flat

the shape unchanged since the 1930s

The Breguet Classique 5178BA/29/9V6

Santos-Dumont Skeleton Watch with micro-rotor Ref. WHSA0031 Hamza G and the movement is onThe Santos Dumont Skeleton Micro Rotor solves a problem that has limited skeleton watches for decades. Openworked movements are almost always hand wound, because a conventional winding rotor would sit across the movement and hide the very architecture you paid to see. Cartier's answer is the calibre 9629 MC, which places a micro rotor within the movement itself, so the watch winds automatically while the openwork stays fully visible. The case is 18K