What is the world's oldest clock?

Question

What is the world's oldest clock?

Answer 1

The sun!  ^_^

Answer 2

Sundial

Answer 3

The oldest working clock in Europe, and quite possibly the world, can be found in Salisbury  Cathedral, it dates from about 1386. There was apparently a mechanical clock already working in Milan, Italy, by 1335, but the Salisbury clock is the oldest of its kind known to still be working.

Answer 4

How about the sun dial.

Answer 5

that one is easy the first peopple to live on earth where in space and built big ben from thre that is why we speak english as our language

Answer 6

The old biological clock.

No I take that back how about the geological clock.