NuVigor Mainspring #100 for Elgin 0s No. 825 - Steel

NuVigor Mainspring #100 for Elgin 0s, Factory No. 825, steel, new in very frail and/or filthy dirty envelope. Be prepared for a pretty rough looking envelope but the mainspring is fine. See image for precise mainspring specifications. 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. Images do a pretty good job of representing the item