HR Mainspring SA760 for Waltham 6/0s Factory No. 2248 / 2265 - Alloy

HR Mainspring SA760 for 6/0s Waltham, Factory No. 2248 / 2265, alloy, new in envelope. See image for precise mainspring specification. 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.