Glossary of watchmaking - Fondation de la Haute Horlogerie

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Automatic (Self-winding)

Automatique | オートマティック | 自动（自动上弦）

Describes a mechanism that winds the mainspring by using the movement of the arm to cause a rotor...

Autonomy

Autonomie | 持続時間／ジゾクジカン | 自主走时时间

The length of time a clock or watch can function between windings.

Autoquartz

Autoquartz | オートクォーツ | 自动石英机芯

A movement that functions like a quartz movement yet is wound like a mechanical movement. An...

Axle

Axe de balancier | 天真／テンシン | 轴

A pivoted steel arbor on which the balance is mounted.

Back

Fond | 裏ブタ／ウラブタ | 底盖

In a watch case, the cover, transparent or not, opposite the dial.

Bagnolet (calibre)

Bagnolet (calibre) | バニョレ | Bagnole（机芯规格）

The extra-flat watch movement known as a Bagnolet is an "inverted" calibre, where the...

Baguette

Baguette | バゲットカット | 方钻

The cut of a gemstone stone that has been cut into a long, rectangular shape. The word baguette...

Balance

Balancier | テンプ | 摆轮

A circular, moving part which oscillates on its rotational axis. It is coupled to the...

Balance cock (modern)

Coq moderne | テンプ受け（近代）／テンプウケキンダイ | 摆轮夹板(现代)

A bridge with a lug anchored to a stud. An index (or regulator) passes over a scale indicating Fast...

Balance cock (traditional)

Coq ancien | テンプ受け（過去）／テンプウケカコ | 摆轮夹板（传统）

Originally, that is in the sixteenth century, balance cocks had a simple, elongated form and were...

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