NuPower Mainspring for Hamilton 534B for 16s - Steel

NuPower Mainspring for Hamilton Factory No., 534B for 16s movements, steel, 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 in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.