HR Mainspring SA713 for Waltham 16s Factory No. 2218 / 2267 - Alloy

HR Mainspring SA713 for 16s Waltham, Factory No. 2218 / 2267, alloy, new in envelope. See image for precise mainspring specifcations. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate good job of representing the item.