Alloy Mainspring for 16s Hampden No. 2696

Unmarked Maker Swiss made Alloy Mainspring for 16s Hampden, Factory No. 2696, T End, new in envelope. See images for further details. 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.