Sandsteel Mainspring for Hampden 12s No. 12696 - Steel

Sandsteel Mainspring for Hampden 12s movements, Factory No. 12696, steel, new in envelope. This mainspring is made primarily for the Paul Revere and Nathan Hale models. These were made in a couple of different strengths and those that I can supply are shown in the drop-down list. See image for precise mainspring specification and further details. 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.