X 10.25mm Center Thickness. Setting: Not Sure, Open Stem. Running: In Some Positions But Not in Others. Balance: Not Good, Broken Staff.This movement has not been checked for duration or accuracy, even if it is described as "running". The item "Arnold Billon Pocket Watch Movement High Grade Swiss Spare Parts / Repair" is in sale since Saturday, September 26, 2015. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Parts, Tools & Guides\Parts\Movements". The seller is "kstar1977" and is located in Hollis Center, Maine. This item can be shipped worldwide.