The first pocket watches were introduced in the 16th century and were only for the very wealthy. As technology made it easier to make and mass produce them in the 1800s, nearly every man would own one. They became especially essential with the railroad explosion, being issued to railroad engineers to keep trains on time. With the advent of wristwatches in the early twentieth century, however, they declined in popularity. Lately, however, celebrities and men’s style personalities have been spotted wearing pocket watches more and more. Are these classic timepieces experiencing a resurgence? Here’s everything you need to know about wearing a pocket watch.