HR Mainspring A756 for Waltham 2243 (Hole) Model 750 - Steel

HR Mainspring A756 for Waltham Model 750, Factory No. 2243, hole end, steel, new in envelope. See images for precise characteristics. 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 a pretty good job of representing the item.