It is the last train wheel. The escapement transfers the power from the gear train in regular and even time sequences to the balance, the oscillating system. ETA movements are used for many renowned Swiss watch brands. The majority of Oris watches are fitted with a regulating lever for particularly precise time adjustment. The system of wheels and pinions which, from the barrel B, transmits the driving power to the escape wheel E, Z1 centre-wheel, Z3 third wheel, Z5 fourth wheel.
E escape wheel.
All these wheels are riveted to their respective pinions, Z2, Z4, Z6.