HR Mainspring A312 for 6s Hampden Factory No. 8696 - Steel

HR Mainspring A312 for Hampden 6s Movements, Factory No. 8696, T end, 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.