Hamilton 14/0s Factory Mainspring #718440 - Steel

Hamilton Factory Mainspring for 14/0s 17 - 19 Jewel Movements, #718440, steel, new in envelope. See image 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 so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.