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TACHYMETER Chronograph provided with a scale giving the average speed in km/h or mph over a covered distance of 1 km or 1 mile. Only applicable for time measurements that do not exceed 60 seconds. Procedure Start the chronograph at the beginning of - and stop it at the end of - a distance of 1 km or 1 mile. The number indi- cated on the tachymeter scale by the second hand corresponds to the average speed achieved in km/h or mph.
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