HR Mainspring A223 for Hamilton 14/0s No. 5021 - steel

HR Mainspring A223 for Hamilton 14/0s movements (Grade 980), Factory No. 5021, steel, new in envelope. See images for further details. 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.