National Unbreakable Mainspring for Elgin 19/0 No. 6330 - Alloy

National Unbreakable Mainspring for 19/0s Elgin Movements, Factory No. 6330, alloy, new in frail 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 and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.