Illinois Factory Mainspring #47354 for 4s & 6s Models - Steel

Illinois Factory Mainspring #47354 for 4s & 6s movements, steel, new in envelope. One of the beautiful thing about factory mainsprings is that they pretty much always fit. See images for further details. I likely have several of these so the one you get may differ slightly from it images.  I specialize is hard to find watch parts and all watch parts are guaranteed. Images do a pretty good job of representing the item.