CR Mainspring for Elgin 16s Factory No. 2325 - Steel

Charles Robert Mainspring for Elgin 16s, Factory No 2325, steel, tab end, new in replacement envelope. I get one of these mainsprings about once every two years as it is for very old, very early Elgin movements. 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.