NuTemper Mainspring #526 for Elgin 4/0s Factory No. 4789 - Steel

NuTemper Mainspring #526 for Elgin 4/0s movements, Factory No, 4789, 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 images. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.