NuVigor Mainspring #88 for Elgin 12s No. 1712 - Steel

NuVigor Mainspring #88 for Elgin 12s, Factory No. 1712, steel, new in possibly frail envelope.  See images 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