Nivaflex Mainspring for 16s Elgin 817 - Alloy

Nivaflex Mainspring for 16s Elgin, Factory number 817, alloy, 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 pretty good job of representing the item.