An essential handbook for watchmakers, watch collectors, and watch enthusiasts. This standard work on pocket watches is a treasure trove of knowledge for watchmakers and watch lovers. It explains in detail, comprehensively, and in an easily understandable manner the components of pocket watches and their functions. This compact book illustrates the fundamental principle of a simple yet mechanically perfect watch using the example of a modern IWC pocket watch. Although it focuses on a pocket watch, this principle can be applied to all watches with a balance wheel oscillation system, including wristwatches. Through its clear, easy-to-understand, and well-illustrated yet systematic presentation, the reader can follow the mechanics of the watch from the moment the mainspring is wound to the time display via the hands and dial. It also delves somewhat deeper into the subject matter.