NuVigor Mainspring #873 for Ingersoll Reliance 16s No. 2365 - Steel

NuVigor Mainspring #873 for Ingersoll Reliance 16s movements, Factory No. 2365, 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 image. 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.