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Late Edo Period

Wall Clock with Circle Graph Dial

The ‘day hand’ of this clock rotates once per day and stretches and retracts in length at different times of year (stretching to its longest at the summer solstice and retracting to its shortest at the winter solstice). This pendulum clock resembles a perpetual clock patterned with a pie chart divided into 24 solar terms under the hand to simultaneously display the time and calendar.

Name Wall Clock with Circle Graph Dial
Time/Period Late Edo Period
Country Japan
Additional information The wall clock employed the most advance clockmaker techniques of the Edo Period to keep time precisely in accordance with seasonal time system, a complicated time system adopted in Japan.