HR Mainspring A306 for 16s Hampden No. 3696 - Steel

HR Mainspring A306 for Hampden 16s Movements, Factory No. 3696, 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 an adequate job of representing the item.