Sandsteel Mainspring for Elgin 10s No. 5726 - Steel

Sandsteel Mainspring for Elgin 10s Movements, Factory No. 5726, steel, new in envelope. See images for precise mainspring specifications and further details. These came 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 pretty good job of representing the item.