HR Mainspring A101 for 18s Elgin No. 812 - Steel

HR Mainspring A 101 for Elgin 18s Factory No. 812, steel, new in envelope. See image for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.