The Chronograph, Its Mechanism and Repair by B. Humbert

This current reprint of the 1952 original edition is a 158 page hard cover bound book on the repair of mechanical chronograph watches. It covers virtually all of the available chronographs (both column wheel and cam operated chronographs) that were produced up until the first publication of this book. It contains very meticulous line drawings that deal with the aspects of repair, restoration and adjustments. "The" book of choice for all reputable watchmaking schools around the world.