Nivaflex Mainspring for 16s Illinois 60hr Factory No. 47309 - Alloy

Nivaflex Mainspring for 16s Illinois 60hr movements, Factory No. 47309, alloy, new 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 an adequate job of representing the item.