====== Swan's neck fine regulation ======
{{wst>image_cl|Lange|L931.3|[[A. Lange & Söhne]] calibre [[Lange L931|L931.3]] with **Swan's neck fine regulation**|250px}}

**Swan's neck fine regulation** is a [[regulation|regulating]] device, consisting of a swan neck-shaped steel spring, a [[regulator]] and an adjustment screw. By turning the screw, the [[rate]] of [[watch]] can be regulated in very fine steps.


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