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Glossary of watchmaking

Blank

Blanc | ブランク | 空壳机芯

An unfinished movement sold as such. Until circa 1850, an ébauche comprised only the plate, bridges, fusee and barrel. It was known as a blanc and was finished at the établissage. The modern ébauche is a watch movement, with or without jewels but always without its regulating organ, mainspring, dial and hands. It is also known as a blanc roulant.

See Ebauche.