Not even that, really. He predates the pendulum by just about a century (and I mean Galileo's discovery of its regularity, not Huygens' employment of it). Sure,

Not even that, really. He predates the pendulum by just about a century (and I mean Galileo's discovery of its regularity, not Huygens' employment of it). Sure, there was verge-and-foliot in limited number in cathedrals and monasteries, but common clockwork - Nuremberg eggs and that sort of thing - came along shortly after Leonardo went away. Sundials and water clocks were the order of the day in Leonardo's time.