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trotteuse

A French term used for a chronograph hand that indicates 1/5th second or 1/10th second depending on the frequency of the balance. In a fly-back chronograph two trotteuses turn together to indicate the measured time. One of them is a fly-back hand which can be stopped independently to read an intermediate timing. When it is restarted, it flies back to join the other hand which has continued to turn.

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