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Exterior The following are the main parts of a watch: Watch Case�the body that houses and protects the watch movement from dust, dirt, moisture and shocks. It also gives the watch as attractive appearance as possible, subject to fashion and to the person�s taste. Crystal �the transparent protective covering over a watch face, made of sapphire, mineral crystal, glass or plastic made of sapphire, mineral crystal, glass or plastic. Dial�the readable part of the watch, the face: Analog display�the system of indicating time using hands and a dial. Numerical display�the system of indicating time figures. Also called Digital Display. Anadigi display�a display that shows the time both by means of hour and minute hands (analog display) and by numbers (digital display). LCD(Liquid Crystal Display)�a method of displaying time in an electronic watch. It is created when particles are rearranged by electrical excitation. In LCD watches time is displayed constantly. All LCD watches have quartz movements. LED(Light Emitting Diode)�The method of displaying time and/or other functions in an electronic watch using the phenomenon known as electroluminescence. The time appears on the watch face of an LED watch only when a button is pressed and power is sent to the diodes. 
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