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

Elgin Factory Mainspring for 8/0s movements, Factory No. 5219, steel, new in envelope. See image for further details. Elgin mainsprings are typically coated in very old grease and must be cleaned before use. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch parts and all watch parts are guaranteed. Images do a pretty good job of representing the item