MERITAS Mainspring for 3/0s Hampden No. 9696 - Steel

MERITAS Mainspring for 3/0s Hampden movements, Factory No 9696, steel, new in envelope. See images for precise mainspring specifications. I likely have several of thee 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.