Sandsteel Mainspring for Elgin 18s No. 1956 - Steel

Sansteel Mainspring for Elgin 18s Movements, Factory No. 1956, steel, new in envelope. See image for specifications and further details. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.