When you start familiarizing yourself with watches, one word that’s going to come up a lot is “movement.” Movement encompasses not only the sweep of a watch’s hands around its face, but the way its inner mechanisms produce that effect. A watch’s movement is fundamental in how it works and keeps time — consider it the “heart” of the watch. Watch movements come in three types: mechanical, automatic, and quartz. Below we explain the differences between them and their pros and cons. Mechanical A mechanical watch has a movement that’s powered by a mainspring — a coiled wire of metal — that is wound by hand. Once the mainspring is wound, it slowly and evenly unwinds, causing the second hand…