Hercules Mainspring #1511 for Elgin 12s No. 2339 - Steel

Hercules Mainspring No. 1511 for Elgin 12s movements, Factory No. 2339, steel, new in envelope. See images for further details. I likely have several of these so the one you get may differ slightly from the images. 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