Sandsteel Mainspring for 11/0s Hampden Factory No. 11696 - Steel

Sandsteel Mainspring for 11/0s Hampden movements, Factory No. 11696, steel, new in envelope. Could also very well fit in other movements as well. These were available in a couple of different strengths and those that I can supply can be found in the drop-down list. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a barely adequate job of representing the item.