Is on free sprung gold hair spring will. Run for a minute or two i think it is a. Power issue when a key is applied to.The item "Rare fusee detent chronometer 3quarter plate arnold escapement 1820-30s unusual" is in sale since Thursday, October 28, 2021. This item is in the category "Jewellery & Watches\Watches, Parts & Accessories\Watches\Pocket Watches". The seller is "watchdealer" and is located in St Leonards on Sea. This item can be shipped worldwide.