This profusely illustrated volume forms a step-by-step instruction manual on the repair of mechanical clocks and watches. Donald de Carle was a Fellow of the British Horological Institute, and the author of many standard works on the subject of horology, who based his writings on many years of practical experience. The book begins with simple clocks and watches then proceeds to more complicated types. The tools and apparatus needed are described and illustrated. Modern types of mechanical clock are mainly dealt with, but attention is also given to the movements of older long case and fusee types as many of them are now being repaired as a result of interest in antique clocks. The chapters on watch repairing deal with chronographs and repeaters as well as self-winding mechanisms. The latest developments in ultrasonic cleaning of horological movements and their electronic timing are also described and illustrated. This work is an invaluable guide for all concerned with the repair not only of clocks and watches but also of small mechanisms in general.