The history of the creation of watches dates back several thousand years. Since ancient times, a man tried to measure time, first by day and night luminaries and stars, then with the help of primitive devices and, finally, using modern high-precision sophisticated mechanisms, electronics, and even nuclear physics.
The history of the watch is a continuous improvement in the accuracy of time measurement. It is reliably known that in ancient Egypt, time was measured in days, dividing it into two periods of 12 hours. There is also evidence that the modern hexadecimal model of measurement came from the Sumerian Kingdom around 2000 BC.
It is generally accepted that the history of the creation of watches begins with the invention of a sundial or gnomon. With such a clock it seemed possible to measure only daytime since the principle of their action was based on the dependence of the location and length of the shadow on the position of the sun.
The history of the creation of water clocks begins in Ancient Persia and China around 2500 - 1600 BC. And from there, it is likely with trade caravans, the water clock was brought to Egypt and Greece