
Lewis Walduck
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The Japanese temporal system of timekeeping divided the days and nights into two sets of six 'hours'. As the seasons changed, so obviously did the length of each of these 'hours'; the summer had longer daylight hours and shorter night-time hours for instance. The foliot balance with a series of notches and a pair of movable weights allowed easy regulation of the timekeeping, but required adjustment twice a day at the end of each six hour period. The current lot uses a double foliot system which automatically changes from one foliot to the other at the end of each six hour period.
A similar clock is illustrated on page 757 in Tardy La Pendule Francaise