Swan's neck fine regulation
![[[A. Lange & Söhne]] calibre [[Lange L931|L931.3]] with **Swan's neck fine regulation** (click to enlarge!)](/lib/exe/fetch.php?tok=47ded5&media=https%3A%2F%2Fwww.uhren-wiki.com%2Fimages%2FLange_L931.3.jpg "[[A. Lange & Söhne]] calibre [[Lange L931|L931.3]] with **Swan's neck fine regulation** (click to enlarge!)")
A. Lange & Söhne calibre L931.3 with Swan's neck fine regulation
© Lange Uhren GmbH
Swan's neck fine regulation is a 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.