An electric-powered watch includes a balance wheel assembly which drives time display means. The balance wheel assembly includes a pivoted balance wheel staff, a central member fixed to the staff, and a balance wheel rim consisting only of a bundle of wires which are adhered together and self-supporting. The wires form a coil which cooperates with one or more magnetic fields to impulse the balance wheel assembly.
A driving mechanism for a timepiece comprises a shaft which rotatably mounts a stepping anchor and a coil. The coil is disposed between a plurality of permanent magnets. Suitable electrical connections are provided between the coil and an impulse generator. The coil may be asymmetrically arranged on the shaft to compensate for unbalances in the mechanism. Alternately, a bushing or disk may be mounted on the shaft to compensate for unbalances.
