Ingenieur 666 A — Calibre 852, Steel

IWC 852

Pellaton-wound automaticAutomaticA mechanical movement wound by a rotor as the watch moves on the wrist. descended from the calibreCaliberThe designation of a watch movement, identifying its design or movement family. 85: two pawls driven by a cam wind in both rotorRotorAn oscillating weight that uses wrist movement to wind an automatic watch’s mainspring. directions. Self-compensating Breguet balance springBalance springThe fine spiral spring that works with the balance wheel to form the movement’s oscillator. and fine regulator. The first Ingenieur ; 8521 is the date version.