List

Cabochon Crown

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Type of gemstone that is fitted on the crown of the watch. The cabochon is shaped and polished, as opposed to being faceted, and is decorative in purpose.

Caliber

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Refers to the type of movement, and its specific functions, used in a watch. The first four digits of the case number identifies the caliber number.

Case

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Houses the internal watch components, such as the movement, dial, and hands.

Case Number

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Eight digit number (normally alpha and numeric) that appears on the caseback. This number is used to identify the watch model number.

Caseback

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Underside of the case that functions to help seal the watch and provide protection to the movement. Caseback types can be either snap on or screw on. Various markings can be found on the caseback, including the case number, serial number, water resistance level, country of origin, and manufacturer.

Circuit Block

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The circuit block controls the voltage and works as an amplifier and power regulator of the quartz movement.

Clasp

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Part of the watch band. The clasp keeps the band securely attached to the wrist and, by unfolding it, allows the wearer to easily remove the watch. The clasp often has minor adjustments to allow for a more comfortable fit.

Coil Block

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The coil block acts as a conductor where the electric current flows between components of the quartz movement.

Crown

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The button that is used to set the day, date, and time of the watch. It is normally located at the 3 o'clock position. Crowns on highly water resistant watches screw down to help ensure moisture does not enter the case. The crown is attached to the winding stem.

Crystal

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The clear glass or plastic that covers and protects the dial. Crystals are either acrylic, mineral, or sapphire (which is the most scratch resistant).