Sandsteel Mainspring for Elgin 0s & 3/0s #2097 - Steel

Sandsteel Mainspring for Elgin 0s & 3/0s movements, Factory No. 2097, steel, new in envelope. See images for precise mainspring specifications. These were available 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 guaranteed. Images do a marginally adequate job of representing the item.