| 摘要 |
Time zone timepiece including an hour hand ( 6 ) capable of being moved forward or backward in one hour steps by means of a manually actuated time setting stem ( 28 ) without affecting the minute display, said hand ( 6 ) being fitted onto an hour pipe ( 4 ) about which an hour hand ( 2 ) is adjusted to pivot freely, driven by a motion work ( 10 ), an additional wheel ( 12 ) secured to the pipe ( 4 ) driving an additional device, the hour wheel ( 2 ) being coupled to the additional wheel ( 12 ) by a limited torque mechanism ( 16 ), the timepiece being characterised in that, outside the periods in which the time zone time is being corrected, the hour wheel ( 2 ) and the additional wheel ( 12 ) are further rigidly coupled by a second coupling mechanism.
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