Case: The outer metal or plastic box that protects the inside parts.Dial: The face of the watch that shows numbers or markers.Crystal: The clear glass or plastic cover over the dial.Crown: The small knob on the side used to set the time.Strap: The band or bracelet that holds the watch to your wrist. [1, 2, 3]Learn more about the physical components of a timepiece by watching this guide on the parts of a watch:7m