Equation clock
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An equation clock is a mechanical clock which includes a mechanism that simulates the equation of time, so that the user can read or calculate solar time, as would be shown by a sundial. The first acc
Made in Germany, 1591
Clock
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A clock or chronometer is a device that measures and displays time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such a
An analog pendulum clock made around 18th century
Casio F-91W digital watch, a historically popular watch introduced in 1989
Simple horizontal sundial
The flow of sand in an hourglass can be used to keep track of elapsed time.