RN Mainspring for Illinois 16s 60hr Factory No 47309 - Steel

RN Mainspring for Illinois 16s 60hr movements, Factory No. 47309, steel, new in envelope. See image for precise mainspring specifications. I likely have several of these so the pone 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.