H.C.Kelly, A Practical Course In Horology (Download)
Please sign up for the course before starting the lesson.
This little book is very good in explaining the physics and regulation of the escapement. It also contains a lot of general information on watchmaking. The book is a bit dated so don’t take all the advise it offers, for example explains the author describes how to clean the parts with cyanid. Please use common sense. […]