HR Mainspring A720 for Waltham 12s No. 2224A - Steel

HR Mainspring A720 for 12s Waltham Model 1894, Factory No. 2224A, steel, 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 in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a suitable job of representing the item.