Watch ... Before wristwatches became popular in the 1920s, most watches were pocket watches, which often had covers and were carried in a pocket and attached to a watch chain or watch fob... Most inexpensive and medium-priced watches used mainly for timekeeping are electronic watches with quartz movements... Expensive, collectible watches valued more for their workmanship and aesthetic appeal than for simple timekeeping, often have purely mechanical movements and are powered by springs, even though mechanical movements are less accurate than more affordable quartz movements...
History Of Watches ... 1500–1600 Clock-watches The first timepieces to be worn, made in 16th century Europe, were transitional in size between clocks and watches...