HR Mainspring SA703 for 18s Waltham Factory No. 2203 - Alloy

HR Mainspring SA703 for 18s Waltham, Factory number 2203, T end, Alloy, new in envelope. See image for precise characteristics. 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.