| 摘要 |
A casing 17 min houses a plurality of wheels including a particular wheel which is coupled to a minute hand of the timepiece, a correction device which can be operated to correct the position of the minute hand, and a slip device which enables the said particular wheel to slip relative to the remaining wheels during such operation of the correction device. Also housed within the casing 17 min are two terminal plates 8 min and 14 min for engagement with a dry element battery, and an electro-magnetically actuated sounder 6 min . The size of a sound outlet 6a min of the sounder can be adjusted by means of a blade (29 min ) to alter the level of the sound emitted therefrom.
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