HR Mainspring A122 for Elgin 8/0s Factory No. 5219 - Steel

HR Mainspring A122 for 8/0s Elgin, Factory No. 5219, steel, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the image. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item