HR Mainspring SA115 for Elgin 0s & 3/0s No. 2097 - Alloy

HR Mainspring SA115 for 0s & 3/0s Elgin, Factory No. 2097, alloy, new in envelope. See images for precise mainspring specifications. 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 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.