Marco Mainspring #109 for Elgin 37s 8 Day Clocks No. 4457 - Steel

Marco Mainspring No. 109 for Elgin 37s 8 Day clocks, Factory No, 4457, steel, new in envelope.  This spring is found in many different applications, including car clocks, aircraft clocks, travel clocks, ships clocks and really big pocket watches. These are possibly covered in some very old grease and will need to be cleaned thoroughly before being used. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.