Is there really a watch part called "Wave of Unrest"?

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"Wave of Unrest" sounds like it's probably a mistranslation of oscillation - the purpose of the balance. The part itself is a balance staff.
 
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Sounds like a translation of the German word “Unruhwelle” (balance staff) that went wrong (Unruhe = unrest & Welle = wave)
 
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You mostly find these at Rolex dealers...