Clockwork is the inner workings of either clocks and watches or other mechanical devices that work similarly, using a series of gears driven by a spring or a weight.
Clockwork of mechanical Prim wrist watch
Clockwork of the Holy Cross Church in Dülmen, Germany
Keys of various sizes for winding up mainsprings on clocks
Mechanism of a Wall Clock, Ansonia Co. 1904
An automaton is a relatively self-operating machine or control mechanism designed to automatically follow a sequence of operations or respond to predetermined instructions. Some automata, such as bell
The book About automata by Hero of Alexandria (1589)
Automaton in the Swiss Museum CIMA
First Strasbourg clock rooster, worked from 1352 to 1789
Clockwork crayfish automaton, made in Augsburg in 1589, Technical Instrument Museum, Dresden