HR Mainspring SA748 for Waltham 6½ ligne movements No. 2239 / 2272 - Alloy

HR mainspring SA748 for Waltham for 6½ ligne movements, Factory No. 2239 / 2272, 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 a pretty good job of representing the item.