Analog watches display time using mechanical hands that move over a dial with markers which represent hours and minutes. The term analog usually describes devices that feature a continuous, uninterrupted signal. In the case of analog watches this refers to the sweeping, continuous second hand, which is the result of internal mechanical movement, not digital electronics.
A crystal is a solid material commonly used in glassware, jewelry as well as a component in various electronic devices such as digital watches. Crystals generally have transparent or translucent properties and can have a wide variety or colorations.