This was invented after his time: https://www.youtube.com/watch?v=fIjnFIwPmIE https://www.youtube.com/watch?v=fIjnFIwPmIE But Gravity powered clock mechanisms

This was invented after his time: https://www.youtube.com/watch?v=fIjnFIwPmIE https://www.youtube.com/watch?v=fIjnFIwPmIE But Gravity powered clock mechanisms existed during Da Vinci's time. I believe.