HR Mainspring SA705 for 18s Waltham Factory No. 2205 / 2281 - Alloy

HR Mainspring SA705 for 18s Waltham, Factory No. 2205 / 2281, Hole end, alloy, new in envelope. See image 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.