Seiko Credor Spring Drive Sonnerie

The ideal bell sound was based upon the combination of a bell system that comprised a newly developed governor and the exclusive sound escape system required to let the chime sound pass through the watch case.The governor mechanism uses the air viscosity to make the chime sound at exact intervals with not a single sound interfering with the pure bell striking. The entirely silent Tri-synchro regulator guarantees the complete silence of the whole movement and the purity of the chining sound. The mechanism applies a special spring with the watch mechanism's barrel to power the hour-striking function.It is easy to operate the movement with the crown found at 3 o'clock and a mode indicator featured at 6 o'clock. The movement of the Seiko watch consists of over 600 individual parts that were meticulously hand-assembled and finished.The exclusive 'sonnerie' mechanism of the Credor Spring Drive Sonnerie has an hour-striking function. It resembles Japanese hanging bell sound opted for due to its matchless lingering sound symbolizing the natural flow of time. The greatest challenge for the creators of the Seiko watch was to reach the purity of sound.