Marco Mainspring #186 for 6/0s Elgin Factory No. 2890 - Steel

Marco mainspring #186 for Elgin 6/0s 1st and 2nd Model movements, Factory No. 2890, steel, new in fraill or cut envelope. 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 so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.