NuRezista Mainspring #685 for 12s Illinois Factory No. 47344 - Steel

NuRezista Mainspring #685 for 12s Illinois, Factory number 47344, steel, new in 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 satisfactory job of representing the item.