This profusely illustrated volume forms a step-by-step instruction manual on the repair of mechanical clocks and watches. The work begins with simple clocks and watches and proceeds to the more complicated types, and the tools and apparatus needed are described and illustrated. The clocks dealt with are mainly the more modern types of mechanical clock, but attention is given also to movements of the older long case and fusee types, as many of them are now being repaired as a result of the great interest shown 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 described and illustrated.