NuRezista Mainspring #728 for Hampden 3/0s Factory No. 9696 - Alloy

NuRezista Mainspring #728 for Hampden 3/0, Factory No. 9696, 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 is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.