Monnat Geneva Mainspring for 0s Elgin No. 825 - Steel

The Monnat Geneva Resilient Mainspring for Elgin 0s Movements, Factory No. 825, steel, new in envelope. See images for precise mainspring specifications. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.