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Screwed chaton at a movement of
A. Lange & Söhne with red ruby

A ruby, in the case of wristwatches, is usually a synthetic ruby. It is used in watch movements as a low-friction cover or bearing stone, in which the pivot of a wheel turns.

More see Jewels.

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ruby.txt · Last modified: 11.10.2021 17:14 (external edit)

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