The barrel at the rear of the movement drives the gear train leading to the spinning front wheel, whose speed is controlled by Spring Drive’s unique tri-synchro regulator. The tri-synchro regulator applies electro magnetic braking to the glide wheel based on the accurate reference signal from the IC and quartz oscillator.

The “tri” derives from three different sources of powers which it uses.

1. Mechanical energy, from the mainspring to drive the regulator.

2. Electrical energy, to create a reference signaling via an IC and quartz oscillator.

3. Electromagnetic energy, to apply a brake via a rotor/stator.

The Tri-synchro regulator controls the speed of the glide wheel and the hands with electromagnetic braking.