About this 3D model
See the prototype here: https://youtu.be/ORaM7y0xu6c See the buid video here: https://youtu.be/oX5HK5Vc9do A design inspired by the earliest mechanical clock It might be as old as 1250 It is not very precise, that is why it has only an hour hand. It was a major step in technology, being the first mechanical clock. 400 years later, Galileo will think about using a pendulum to improve the precision, it will be almost another 100 years before it becomes reality with Christian Huygens clock