| 摘要 |
A clock movement having a moon dial that includes symmetric teeth about its periphery. The movement also includes a driving gear with a pin that engages the teeth so that each rotation of the drive gear advances the moon disk. Because the moon dial teeth are symmetric, the moon dial can be rotated either forward or backward by moving the driving gear either forward or backward. The rotational support of the moon dial includes a wave washer to apply a small frictional force to prevent freewheeling.
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