Elgin 18s Mainspring No. 812 (EXACT) - Alloy

Elgin EXACT Mainspring for 18s movements, Factory No. 812, DB&H end, alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one your 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.