HR Mainspring SA756 for Waltham 7½ ligne movements 2243 / 2266 - Alloy

HR mainspring SA756 for Waltham for 7½ ligne movements, Factory No. 2243 / 2266, alloy, 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 images. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. See image for further details. Images do an adequate good job of representing the item.