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| Adjusted: |
A term referring to temperature correction and positional timing of the watch movement. This reference has different meanings depending on whether the watch is a pocket watch or a wrist watch. Temperature means the watch can accurately keep time between 42 and 92 degrees Fahrenheit. Positional timing means the number of adjustments.
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| Analog: |
(Analogue) Any watch or Clock with hands instead of a digital readout.
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| Arbor: |
The shaft or axle wheel that turns in a bearing |
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| AWCI: |
The American Watchmakers-Clockmakers Institute. |
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| Balance: |
The oscillator or wheel which with a balance spring (better known as a hairspring) connected, is the timing controller of the watch escapement.
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| Barrel: |
The container that holds the mainspring.
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| Barrel Arbor: |
The axle of the barrel around which the mainspring is coiled or wound.
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| Bezel: |
The part of the watch case, ring or frame that holds the crystal in place.
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| Bow: |
The part of the watch which a chain can be connected to. Generally the crown is located inside the bow. |
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| Bridge: |
The upper plates in a watch movement containing bearings for the wheel pivots. |
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| Cannon Pinion: |
A thin tube with pinion leaves at the lower end, usually connecting the minute hand at the upper end. |
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| Cap Jewel: |
A flat, solid jewel which allows the pivot end to rest. Also known as the end-stone.
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| Case: |
Container holding the watch movement. |
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| Case screws: |
Screws that hold the movement securely to the case. Usually there are two or three per watch holding the movement in place.
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| Center Wheel: |
This is usually the wheel at the center of the movement which, the cannon pinion is attached to. Sometime referred to as the "second wheel".
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| Chronograph: |
A watch with stopwatch features. |
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| Chronometer: |
An extremely accurate clock or other timepiece. Usually used in scientific experiments, computer system synchronization, or other sciences. |
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| Click: |
The pawl used to prevent the ratchet wheel from rotating backwards after the mainspring has been wounded. The sound the watch makes as the pawl passes over the ratchet wheel tooth. |
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| Crown: |
The button at the top of the stem that is used to wind the watch. Sometimes referred to as the winder.
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| Crystal: |
The glass or plastic part of the watch used for protecting the hands and face of the watch. The Crystal is held in place by the Bezel. |
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| Cylinder Ecsapement: |
Invented in England, it is a type of escapement for setting the time. Unlike the level type that was used before it's invention.
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| Damaskeening: |
Ornamental Work etched into the metal of the watch. The European terms are Fausses Côtes, Côtes de Genève or Geneva Stripes |
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| Demi-hunter: |
Also known as a half-hunter. A watch with a whole cut in the front of the cover showing the hands of the watch. Sometimes the hole is filled with a crystal. |
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| Detent: |
A method to arrest rotation in one direction. One example is the pawl preventing the wheel from rotating backwards. |
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| Dial:: |
The face of a watch, clock, or any other time piece. |
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| Double Sunk Dial: |
A style of watch where different parts of the watch are sunk separately from each other. For example; the second hand is sunk separately from the minute hand.
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| Duplex Escapment: |
A sunburst type escape wheel. This wheel give direct impulse to the balance in alternate movements. |
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