If you were ever curious about how the mechanisms in old clocks worked and want to differentiate your mainspring from your escapement then take a look at this British Museum blog post. There are some lovely examples of 15th-18th century clocks together with a description of their insides.
If you prefer a video…voila! You can go here.
Lastly, here’s a short video explaining how if, in the 1600s, you woke up in the middle of the night and wanted to know the time, you could find out - How to Tell the Time in the Dark.