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Gold plated watch movement with perlée

Perlée or perlage are French expressions for pearl pattern, a decorative pattern consisting of small circles (pearls) applied to a surface by grinding. It is mostly used in the automotive and watchmaking industries as an indicator of superior craftsmanship, particularly if applied by hand rather than machine.

Application of a concentric perlée pattern on a watch movement main plate

Perlée in the watchmaking industry[edit]

Watch components that are given a perlée pattern may include the movement main plate and bridges, the inside of the watch case and the watch case bottom. The perlée patterned parts of a wrist watch are commonly invisible from the outside except if the watch has a transparent casing or deliberately exposed internal parts.

Further grinding patterns used by watchmakers include the clavus pattern, also known by the French term oeil-de-perdrix (partridge eye).

Perlée in the automotive industry[edit]

The automotive industry has used perlée patterns on surfaces such as car dashboards since its infancy, but these days it is generally confined to luxury vehicles such as the Bugatti Veyron 16.4.

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