Maintaining power mechanism:
Movement unit, consists of maintaining wheel, maintaining power spring, maintaining click. Transmits power while winding the clock.

Minute wheel:
Part of the gear train. Riveted to the centre wheel pinion but free to rotate on the minute arbor. Linked to the train by a friction spring. Drives the fourth wheel pinion.

Motion work:
Unit with two engagements. Transmits the motion of the minute hand with the ratio 1/12 on the shaft of the hour hand. Motion work has cannon pinion intermediate wheel, intermediate wheel pinion and hour wheel.

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