IWC - INGENIEUR CONSTANT-FORCE TOURBILLON
At the heart of this watch is the hand-wound Calibre 94800, which boasts two barrels that store up to 96 hours of power reserve. This massive well of energy is regulated by a patented constant-force mechanism, which engages and disengages the escapement (the watch’s mechanical heart) in one-second intervals that continually store and dispense energy to keep the watch ticking at a constant rate.
The constantforce mechanism is underneath the tourbillon. A wheel locks and releases the mechanism constantly to regulate dispersion
of the energy The tourbillon bridge acts as a second hand. The movement of the constantforce mechanism propels the hand forward once every second