Comsco Mainspring #1180 for 16s Hampden Factory No. 3696 - Steel

Comsco Mainspring #1180 for 16s Hampden movements, Factory No. 3696, 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 likely have several of these so the one you get may differ slightly from m 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.