When they made the first clocks, how did they know whether they were accurate?

Question

They had nothing to compare the clocks against, and I don’t think the stars and the sun would have made an useful target for comparison.

In: 17

Answer 1

I don’t know exactly what they did but you can always compare multiple clocks against each other.

If you make several clocks, you can set them running and see if they still agree with each other after some time. If you are happy with the accuracy of the type of clocks you can then set it against some known period of time