Jurgensen Mainspring for Illinois 6/0s #47370 - Steel

Jurgensen Mainspring No.705 for Illinois 6/0s movements, factory #47370, steel, new in envelope. See image for further details. 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 unconditionally guaranteed, even the cheap ones. Images do a pretty good job of representing the item.