NuVigor Mainspring #83 for Elgin 16s No. Factory No. 817 - Steel

NuVigor Mainspring No. 83 for Elgin 16s, Factory No. 817, steel, new in very frail and torn envelope. See image for precise mainspring specifications. I may 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. Images do a pretty good job of representing the item